I bought a Razer Deathadder
with my computer. I had previously used the stock microsoft mice that came with my computer, or one time I bought a mouse at Walgreens, and never really saw the need to upgrade. But I must say, this Deathadder was a great purchase. The Razer site lists the mouse at $59.99 but I got mine on sale at newegg
What I like
Good, solid weight and sturdy feel.
You can customize the mouse profile for different things. You can set the dpi and the polling, the sensitivity, whether or not the mouse lights up, the scroll speeds, etc etc., and save them in up to three different profiles. It's very useful if you play a number of different games where you would want different sensitivities.
Pretty blue lights.
Nice braided cord.
I don't accidentally click or scroll at inopportune times like I was doing with my cheap mice.
I can actually see a drastic improvement in my gaming ability. My gameplay improved simply by using a better mouse, because I was able to fine tune my muscle memory when my mouse always does exactly what I tell it to exactly when I tell it to. There is no more slight unpredictability to the mouse movements which makes it hard to develop solid muscle memory.
Well-priced. Yes, you can buy better mice (this Razer Mamba
looks pretty nice), but this is an affordable yet high quality mouse for a gamer.
What I don't like
I haven't found anything about this mouse that I don't like yet.