Dynaflex IronPower Force 2mm Steel Gyro Metal Powerball (Black)

Finally broke down and bought one of these after posting several questions and researching some of the high-end gyro exercisers. This one seemed the best of the bunch--it opens up easily for cleaning and there are replacement parts available from Dynaflex. I did email Dynaflex directly with questions, a couple of times, and my emails were bounced back. Their website is absolute garbage. Neither of these things were terribly confidence inspiring. However, the Amazon community was there and addressed some of my concerns. Based on what I have been told, long term reliability is good and you probably shouldn't need those replacement rings, but it's just nice to know they are available if you need them. The crappy DFX website lists the rings at $3.99, but when you actually click the Buy Now button, they are listed at $12 + S&H. Your purchase includes 1 spare set of rings as well so no rush to buy additional sets.So what do I think about it now that I finally have one? It's great! I spent a few months with a cheapo, plastic, DFX Pro which was purchased from Sports Authority. The DFX Pro is cheaply made and it looks, feels, and sounds that way. In contrast, the Iron Power is made in Germany and is perfectly constructed and balanced. It comes in a nice presentation box as well. There are no unpleasant vibrations, even at high speed, and it is whisper quite. Startup is easy with just a flick of my thumb but I had a lot of practice with the DFX Pro. I highly suggest starting with a cheaper model if you are not sure how to use a gyro exerciser or not sure if you will like one yet. Resistance is higher but so far it is not a night and day difference like I was expecting. I do miss the way the DFX Pro fit my hand, as well as the rubber grip, but that is just personal preference and something I may just have to get use to.I work in software so I am constantly on my keyboard. I have carpel tunnel in both hands but my left hand is particularly bad. So far, I have noticed a marked improvement from using a gyro daily and I hope it only gets better from here. Wrist and hand pain is not as severe or as frequent, but still there. I will continue to use this Iron Power and update this review in a few months.

This was honestly one of the biggest wastes of money to me. The product never worked properly (it spins for about 5 seconds max and never worked with the charger) and my problem was that I waited too long to try it out and was never able to return it. I tried using it again recently. I dismantled and replaced the 3 inside rings and there was no change at all. It's funny how the ones that are NOT metal are 1/10th the price because they know these would not have a long shelf life anyway. Basically, this was a $140 lesson on not wasting money based off a video recommendation (check to make sure your products work when you receive them!).

I loved cheaper power ball so I upgraded to Ironball. I thought it will be the Rolls Royce of gyro ball. I am disappointed. It's not any better than cheaper power ball in terms of enjoyment. It's slippery as well. Only the material is better because it's metal instead of plastic. Stringless start is not doable whereas it easy to start powerball without the use of string.

Good weight/resistance when spinning, makes for a decent forearm and wrist exercise, but the black shell is powder coated (or some similar finish) and it can be slippery, which isn't necessarily bad, but makes you grip the gyro that much harder so it doesn't get away from you when spinning at speed. I would prefer a better grip to wrap around the gyro. However the gyro is very well made and has replacement rings included (these are the parts that wear out!), so this is built to last. The storage box is a nice addition, but really isn't necessary.

First the good, this thing is solid and very well made. I threw it half way through my wall in a fit of rage one night and not so much as a scratch on the thing. It feels smooth and is much more quiet than the plastic version.My only problem is after extensive use (I used it several times a week for about 6 months) I've seen virtually no strength gains, it doesn't provide enough resistance to actually build muscle. I've since switched to grippers and my grip strength is improving rapidly now. It's also slippery and I had to wrap it with gaffers tape to keep it from moving around in my hand (some knurling would really help). the only thing it seems to help with is tendonitis I occasionally get in my elbow. Its a cool desk toy but a crappy way to build hand strength. I'd still probably buy another one if they made a knurled version.