Logitech MX400 2-Tone 5 Buttons Tilt Wheel USB or PS/2 Wired Laser Mouse

Pros: Best thing about this mouse for me is it works with PS/2. I use an 8 port KVM and this mouse gives me the bset performance of a PS/2 mouse that I can find. USB performance with a PS/2 connection.

Cons: None

Other Thoughts: I had to replace my old one, wore it out after a year and a half.

Pros: Ergonomic shape fits great in hand, and lightweight so you don't have to be Hercules to push it around.

Cons: Switch bounce! The buttons bounce causing double-click interpretations when only a single click was made. You need to HOLD the button down so firmly that it slows you down, but you STILL get switch bounce. Letting go of a button causes the button to bounce!

Other Thoughts: This is the second one of these I've owned, and both develop this switch bounce within 6 months. Cheap parts make this mouse a bad choice!

Pros: comfortable shape, well placed buttons, you won't lose your grip, because the sides have a rubber area for your thumb and ring finger. It's very ergonomic.

Cons: The paint on the left click button has chipped and worn away into a very uncool patch. I guess I thought it was just molded plastic, but in fact, it's painted over, and the paint wears away. This mouse was never intended for the heavy use of a gamer. After 3 months of use, averaging 12 hours of use a day for gaming, graphics design, web browsing, and web development, the left click button has given up the ghost, and now is either unresponsive, or overly responsive, registering double clicking as a single click, or a single click as a triple click. In short, this clicker's busted.
The pads on the bottom of this thing gave out pretty quick too. I've had other mice that lasted 6 months and longer, but the feet on this thing gave out after about a month and a half.

Other Thoughts: If you're looking for a gaming mouse, this probably isn't for you. If you want a comfortable work mouse for light use, web browsing, and precision selecting, this is great. The front and back thumb buttons can be bound to key strokes or undo/redo functionality, which is very helpful.

I called Logitech, and their customer service was GREAT! They actually replaced this mouse for a better one, and wished me happy fragging.

Pros: For larger hands, it fits very well. Button layout and response is all great. No problems with any of the features of this mouse.

Cons: None so far!

Pros: Mouse points to where you send it.

Cons: Mediocre quality and the software isn't the best.

Other Thoughts: The finish wears off where your fingers rest due to the normal body acids. No right click function on control wheel.

Pros: Great size and shape
Accurate and responsive
Excellent build quality and feel

Cons: Poor default auxiliary buttons can cause headaches.
Setpoint software is invasive and bloated, but needed for changing button assignments.

Other Thoughts: After months of struggling with a Logitech Bluetooth Mouse and Keyboard combo, I gave up and went back to corded. I pulled my old Logitech Elite media keyboard and ordered the MX400 mouse. Logitech's Bluetooth products are awful, as is there software, but I've found their corded products to be just fine.

Overall I'm pleased with the MX400 mouse, with one exception: The "back" button, one of two side buttons located just above where your thumb rests, can be engaged accidentally if you're not careful. Generally that doesn't cause a problem, but if you're on a web page, filling out a web form (or writing a review such as this) and you accidentally hit the back button, it's the same as hitting the back in your browser - in other words it's a great way to loose all of your text. It's super annoying and there is no way to change this behavior unless you install Logitech's Setpoint software - which is just one more annoying application the system must load at startup.

Pros: Really accurate
Works with Mac OS X

Cons: Wheel's middle and horizontal scrolling buttons.

Other Thoughts: Let me first start off saying that I didn't purchase this mouse through Newegg, I got it through Logitech itself as a replacement for my old MX518 that didn't have Mac OS X support. The first thing I noticed about this mouse was that its wheel was difficult to press. When it did press, it would activate its wheel scrolling buttons which either go left or right. This became very uncomfortable since I set them up to control the volume, so whenever I needed to press the middle mouse button, it would click, and additionally would also change the volume as well. Needless to say I sent it back for a new MX518 and ended up spending an extra 20 for USB Overdrive software which works very well. This mouse loses two eggs because the wheel renders the mouse close to useless if you like to use all the mouse buttons while web surfing or gaming.

Pros: This mouse is all around a good mouse. Its laid out almost IDENTICAL to an MX518, only real difference is the lack of sensitivity adjustments and the tilt scroll wheel, which I actually use. And it weighs almost exactly the same as the MX518. Even though its less DPI than the 518 I haven't noticed any real differences in playing FPS's like CSS, TF2, or any of the BF series. All in all a good mouse.
Works on irregular surfaces. I've actually used mine on shag carpet before and it worked perfectly.

Cons: The laser can be pretty sensitive at times. Every once in a while a piece of fuzz will get in the optical hole and make it track strangely. Blow it out and its ok.
The scroll wheel did act up once, felt like a lopsided tire. But it worked itself out after a week or so. So I'm assuming something got inside there and caused it.

Other Thoughts: Setpoint software is useless to me. All the buttons works just fine on XP.

And if you're having a problem gaming with this mouse TURN OFF MOUSE ACCELERATION. The faster you move your mouse the further it'll go, making precise gaming impossible. Turn it off and you'll never have that issue.

All in all I am very happy with this mouse, especially considering the price.

Pros: Really nice mouse with a good feel.

Cons: After about 6 months, the scroll wheel didn't act right anymore. The detents still felt the same but the jumps on the screen were larger than before. It became annoying and I had to chunk it.

Other Thoughts: I bought a new Logitech G5 which I think is a better quality mouse.

Pros: Sturdy build quality, very precise laser with good tracking. I use mine for gaming and works very well.

Cons: Middle click button is a bit difficult to push down.

Other Thoughts: If you are looking for a chap gaming mouse with a laser this one does the job.