Summary: This mouse is great. It is very comfortable. It is great for gaming. You can turn up and down sensitivity when need to with a click of a button. I recommend you to buy this mouse if you are going to use it for gaming.
Summary: I went from a stock ball mouse (<200dpi@200hz) to the G5 (2000dpi@500hz) and my accuracy in FPS's improved dramatically. The mouse just feels natural in my hand, w/ no buttons you can accidentally push (unlike the G3). The scroll wheel feels very smooth and doesn't skip over weapons when switching. The dpi buttons are useful for lowering sensitivity for menus or sniping.
Summary: Well if you are looking at purchasing a G5 then you probably know all the Pros. The only Con that I can think of is that there is no Forward Button, only a Back. They fixed this in a later version of the mouse. Overall its an amazing mouse and is definitely worth the money.
Summary: eh.. i bought this mouse just because of the bf2142 designs it had on and it was the only one on the shelf. Now as a mouse... it's good. I haven't really messed with the weight thing but i'm sure it's helpfull somehow? other then that it's been really good to me and i got it at for like 50bucks at walmart(6months ago?). I probably not gonna buy a new mouse for a long time... or til i decide to go wireless.
Summary: Not much to say other than this is an AWESOME mouse - best I have ever owned. DO NOT go cordless if you are a serious gamer - use this. Graphics are ok and for the price, you can't go wrong. UPDATE 03/2011 - Still the best mouse ever invented. Works great. Graphics are sweet also.. Love the quick speed button change on top - unbeatable for gaming.
Summary: After purchasing this mouse I can honestly say my fraggin of my enemies has increased dramatically. Having a mouse that can keep up with your movements is something of a beauty and I only wished I had invested in one earlier in my gaming career.