Logitech MX400 Performance USB/PS2 Laser Mouse

I just switched from PC to iMac. Wanted a mouse that I could configure and felt better than the supplied Mighty Mouse. Also wanted a corded mouse that I could use in working with images in Photoshop.The MX 400 has more than satisfied me in the week I have been using it. I was able to configure the buttons to do what I wanted and had no trouble at all with the downloaded Logitech software for Mac.As others have noted the wheel click is much stiffer than any other mouse I have used. I intentionally set out to train myself to use it and am getting pretty good.In all other respects the mouse performs flawlessly. It is comfortable, responsive and precise. I love the amount of control I have over programming the buttons.The last thing I figured out--maybe everybody else got this but me--was the side scrolling function of the wheel. I thought this was for moving the cursor or highlighting inside a word processor document or spreadsheet. (Maybe it does, but I have not figured out how.) So far the only way I found the tilt wheel function works is to scroll horizontally within a window that is open narrower than the full width of its contents. Just as the scroll wheel when rotated moves the window contents up or down, tilting the scroll wheel left or right scrolls the window contents left or right. That's helpful sometimes but with a wide aspect monitor that displays windows at full width, I don't see scroll bars at the bottom of windows that often.All in all, the MX 400 exceeds my expectation and is well worth the price.Update 1/11/09As I hoped, I am getting better functionality even with the stiffness ofthe scroll wheel click. I expect in another couple of weeks, it will be second nature.

Designed specifically for right handed people - I use the Logitech "MX 400 Performance Laser Mouse" with my desktop Macintosh computer, and love it. The "MX 400" is said to have a more accurate tracking ability than an ordinary "optical" mouse, however, this is not why I recommend it. I find the "MX 400" to be as good as my old Kensington "Elite Optical" mouse for routine tracking, but in spite of the hype about laser tracking being better, I have not found this to be the case. In fact, when I use "Photoshop Elements" to trace the outline of an object in a picture, the "MX 400" is a little trickier to control than my old "Elite Optical". But what makes the "MX 400" a great mouse to use, is its overall shape, and the placement of its two customizable side buttons. The "MX 400" is ergonomic without being weird, and is the most comfortable mouse I have ever used. Its two customizable buttons are both on the left side, and very easy to trigger by just the use of my thumb. Other mice I have used, including the "Elite Optical", had a customizable button on both the left and right side of the mouse, and positioned them in a way that made it awkward to trigger either without first shifting my hand's grip on the mouse. This is not the case with the "MX 400" - this mouse allows me to hold it with a natural and comfortable grip all the time, while still being able to trigger either of its two custom side buttons quickly and easily. I therefore recommend the Logitech "MX 400 Performance Laser Mouse", for its superior design and great comfort in using.

Simple mouse. Fits well with the curvature of your hand. Has all the stuff a basic mouse should have. Laser tracking, forward/backwards, scrolling up/down/left/right.The mouse feels solid without that empty cheap feeling. The place where your fingers on either sides touch the mouse are rubber for better grip.Looks sleek and the buttons are responsive and clicky. I hate it when mice clicks feel like there's something in the way. I like the clicking.I lift my mouse up all the time because I use a standard mousepad at work and this is what I'm using it for. It doesn't spaz out when I lift the mouse which is a definite plus. You could also probably use this for gaming, if you don't care about the ability to program gaming mice.I would recommend this mouse for anyone looking for a right handed ergonomic laser mouse.

Every time you try to use the middle click you end up also either hitting the left or the right wheel click at the same time. It is also next to impossible to tell if you really clicked it or not, as there is almost no feedback for the button press.

the scroll wheel click is SO ANNOYING! its freaking LOUD! no problem scrolling down, but scrolling up is really loud CLICK CLICK CLICK CLICK CLICKI can't believe i paid $50 freaking bucks for thisalso, a problem is when customizing the buttons, you cant make the side to side scroll wheel buttons function as scroll ! this is an essential function for technical analysis in finance. will be sending this back, too bad I shredded the crap out of the packaging

This mouse has a nice ergonomic design and high resolution, but has two significant problems. The first is that the laser tracking system is easily affected by hair. Not a big deal if you don't have pets that shed, but if you do, it will cause problems and you'll need to be vigilant about keeping your desk clean. The second problem is that the tilt scroll wheel is too hard to use as a third button. I don't have the drivers installed, so it's only used as a third button, and it's already hard enough to push it just right to activate it (and sometimes I inadvertently end up right-clicking, too). I don't even want to think about how aggravating it would be to try to use it with the tilt wheel function active. I highly recommend the MX310. Its only real drawback is that it has a symmetric design, so it's not as comfortable as the MX400, but its LED tracking system is rarely affected by hair and its scroll wheel is easy to use as a third mouse button. If I had a choice now I would take the MX310 over the MX400.