Pros: Ultra smooth, great response, works on my mouse pad, looks good, matches with my color scheme, seems very durable, perfect weight & worked right out of the box even though I didn't install the software first as was recommended
Cons: Only con is I didn't buy it off newegg...found it on another site for almost half this price shipped..and couldn't pass it up at that bargain price..felt like I cheated on NewEgg, but I needed a mouse that was good with gaming and affordable. The cheap 8$ Logitech mouse from Walmart I had been using just wasn't cutting it.
Pros: Nice form factor is you don't care for ergo mice. Scroll wheel is nice and clicky, key for games. Side buttons are solid and give an audible click. Great tracking and decent DPI settings. Great drivers with perfect integration into the Windows 7 mouse control panel applet.
Cons: A little light, might be an issue for some, doesn't bother me. Side buttons are slightly offset compared to some mice, took me a little adjusting but not a deal breaker.
Summary: after 5 years of use, it has started giving problems and goes unresponsive. Now that its dying, and i surfed the market for replacement, and it turns out that this was the best mouse in its price range. Excellent for gaming, very responsive. I would love to get hold of it again.
Summary: I like this mouse. It has a good ergonomic design and customisable buttons, along with up to 2000dpi which I find is enough. Solid mouse and my last one from 2011 is still working fully, I decided to buy a new one as I don't think they are widely available anymore. I know people talk about the side buttons being too small, but in fact it just takes practice. Fully recommend.
Summary: This is a really good mouse. The symmetry is quite useful as I use it for both left and right mousing, depending on my mood. The switchable DPI settings are actually quite useful (sniping in games etc). It's comfortable enough to use for long periods, could be a little heavier though.
Summary: Bought this mouse to replace a failing Microsoft Laser Mouse 6000 (sadly not in production any more). It has a very nice feel it, slides effortlessly on the desk, very good precision and good size. The one complain I have it that the side buttons are recessed which makes them very difficult to use. This didn't really come as a surprise, it is clearly stated in the description and is in fact a design feature, albeit a poor one IMHO.