It's not the most feature-filled mouse, I must admit. It doesn't have additional weights you can put in, or a dozen buttons. It's also rather light, and some people prefer a heavy mouse, or at least one with a little heft. It's also expensive for what you get.
Those criticisms aside, however, it does one thing very well- it points the cursor. The buttons are not too stiff, and the mouse is just the right size (I prefer them slightly on the 'full bodied' side, unlike some of those mini-mice you can get today). The scroll-wheel works well. Once you get used to the back and forward buttons (slightly further back than I'm used to, and relatively small), they're easy to press and not stuff. The mouse is responsive, tracking is accurate (I use it without a mouse-pad, on a textured wooden desk) and it comes with an adequately long cord.
All in all, quite a nice mouse; now, if only it were priced at $10 instead of $20.