【Dual-Backrests】 Alpha - Ergonomic Office Chair, Breathable Mesh Office Chair, Synchronized Tension Tilt, Posture and Pressure Distribution, Fully Adjustable Headrest and Armrest (Black)

Duorest Alpha vs. D2A:I've been searching for a comfortable chair for years and never have been happy with any of the ones I've tried and have spent a lot of money on. I work in front of a computer for up to 10 hours a day and have chronic neck and back issues.The chairs I have tried thus far have been:- Herman Miller Aeron- Herman Miller Embody- Steelcase Leap v2- Steelcase Gesture- Lifeform- Haworth FernI gambled on the D2A and really liked the back rest and sitting position, but the seat pan is not ideal for someone my size.At 6'2" and 200 lbs. the seat pan is too shallow and the distance it moves out is very limited (at most 1.5"). In addition, the latex foam immediately bottoms out and you end up with very sore sitz bones in less than half an hour. I tried to find a seat cushion to relieve pressure points, but the height of most cushions changes the seating position and ruins the benefit of the back and headrest. And, having to get an additional cushion adds anywhere from $50-$100 to the price of the chair just make it comfortable.Additionally, the overall quality of D2A reminds me of a mid-level task chair you get from Staples. The seat module and levers are made of very lightweight, flimsy plastic and there is zero tension control for tilt. The Donati self-adjusting tilt mechanism is worthless in providing any real resistance or tension.However, since I really liked the back rest, I decided to give the Alpha a try.The Alpha is in a totally different league in terms of the quality of the seat pan module. Ever since my experience with the Herman Miller Aeron, I have been hesitant to use mesh chairs. But, the reviews for the Alpha seemed to rate the comfort highly and I'm glad I decided to try it.The mesh seat relieves the pressure on the sitz bones and the curved shape places your lower back in a better position against the backrest. The seat module is much heavier and more substantial, the levers feel quality, and seat pan sliding mechanism actually moves properly.There is also one other difference that I didn't know about until I put it together. There are two depths you can place the back rest into the seat module. This first position places the back rest well over seat pan and would be good for shorter or smaller folks. The second positions moves the back rest about 1.5" further back from the seat pan (this is in addition to the seat depth adjustment). This difference seems small, but it literally was the key thing that made everything work for me on this chair.The assembly on the Alpha is also much easier and fitment tolerances are much better.The arm rests are slightly different on the Alpha vs. the D2A, but they are both adequate if not a little cheap feeling and are made of very hard plastic. The Alpha arm rests are ever-so-slightly tapered at the back and a tiny bit longer. They rattle a little when moving around, but adjustability is fine and you should be able to find a comfortable position with either.I recommend getting these pads for the arm rests. They fit perfect and are very comfortable:https://www.amazon.com/gp/product/B01M8F9IYC/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1The headrest on both models is a bit cheap. It would be nice if they were slightly more padded, had another couple of inches of height travel, and could be tilted forward to reach the back of your neck while sitting in the locked vertical position. They aren't bad... just not great.I like the color-way of the Alpha I got in White/Blue.tl;dr- If you are looking at this type of chair you can skip the D2A and just get the Alpha.- The Alpha, while still not a $600 chair in terms of quality of materials, seems to be a much better value vs. the D2A (which should be $250 max).- Time will tell if the materials hold up, or not.

First of all, this chair takes several days to get used to and to setup all of the adjustments--since pretty much everything is adjustable.I originally purchased the D2A because these chairs are basically the same except the Alpha has adjustable tension on the tilt and also a mesh seat (and costs $100 more). I felt the tension on the D2A recline was a little too tight for me. I felt like I was always fighting to lean back. But I did like the self-tension tilting system for both chairs to move with you as you lean back and forward. I have always locked the tilt on my previous chairs and never leaned back but the Duorest self tension tilting gives support to your back no matter whether you lean forward or back. Now I like the good feeling of leaning back while I'm talking on the phone or waiting for my computer to do something--including using the headrest--which I have never used before.When you first sit in this chair your back will automatically go, Ahhhh, this feels SO good!. But after the end of the 1st day my back was hurting. I found though that this chair just takes some getting used to before it really starts to feel good.I was also very seriously considering spending big bucks to buy the Herman Miller since I felt ready to graduate from the $350 chair from Office Depot. During my search I ran across the Duorest which looked like I might be getting a chair just as good but for a lot less. I haven't tried the Herman MIller so I can't compare but I saw reviews from others who had who said this chair was ever bit as good if not better.One of the downsides of the Duorest (both D2A and Alpha) is that the shaft is built for a taller person. I am 5'6" so I needed a shorter shaft to lower the chair enough for me--which worked great once I did.I also found the D2A seat to be uncomfortably firm so I would recommend a chair cushion for that chair. My husband ended up taking my D2A and using a seat cushion and loves it--he is 6' tall. I prefer the mesh seat of the Alpha and the ability to adjust the recline tension. Also the Alpha mechanics of the knobs are a lot more modern and less "clunky" than the D2A but once you have everything setup, that doesn't really matter.Now that I have my chair all adjusted, it's definitely the MOST comfortable chair I have ever owned.As others have mentioned, the wheels do not glide as easily as easily as other chairs so you feel you're having to fight it a little if you need to move--not much of a big deal for me.I found the customer service of this company to be EXCELLENT! As I was getting used to the chair, I talked with them on numerous occasions and they always offered helpful feedback and suggestions.For me, one thing that would have been helpful is to have some kind of guide as to where to start adjusting all the different features. There are so many adjustments it is hard to know where to begin. I just kind of started in the middle and adjusted each feature as something started to "bug" me. I made notes as I made changes so that I would know what I had already tried. The first day was hard for me anyway so I wouldn't recommend spending much time to adjust until day 2 or later.The other thing I like is being able to lower the arms (on both chairs) so I don't have to use them and they are out of my way. But I also have the option to raise them and use them if I want to.

So I have only had the chair for a week and in a way it's amazing with the right adjustments and I would say most important this is not a gaming chair or a relaxing chair this a I want to work and have good posture chair. I have tried many ergo chairs and lots of times you get that feeling the lumbar is too much or not enough I don't feel that with this. So far I have sat in this everyday for about 10 hours and I do not have back pain but I do feel like I got a massage which for me is weird I'm not a big massage person.Pros: 1. Very adjustable, first the lowest height is the highest I would ever go and I'm 6.3 my desk is 30 in high so for one how a lot of chairs over time sink you never have to worry about this it can't go any lower. The seat can go move back and forth really helps for taller people, and the backrest can be installed in two positions.2. Feels well built and I could see this chair lasting long as I don't know what could break as it feels like a sturdy metal.3. Super easy to put together its 3 screws no need for a tools.4. Back support like no other chair best way to describe is imagine your getting a massage and on your lower back and you paused it.5. Recline is perfect feels very premium no noise squeaks very adjustable.Cons: (also I am new to ergo chairs, use to bad posture, and 6,3)1. Mesh bottoms or just mesh in general I never been a fan of but it does feel cool all the time, and the lip around mesh is hard won't affect you if you sit correctly.2. The back support will get warm and maybe that is good thing for some having a little heat on your lower back.I'm really thinking about trying the lower version of this chair as it has cushion bottom but it is not as adjustable as this chair.