I bought this mouse to replace basically a really old microsoft mouse blue. Its really my first wireless mouse and i'm quite satisfied with it. At first I thought i would not like the added heft of a mouse with a battery inside it, but I suppose this one just really isnt too bad at all. especially given it has 2 batteries (some mice have only 1 now). That said i prefer it with 2 batteries as they tend to last longer and give better range. Anyway i like this mouse because the blue trak technology makes it track very well on almost anything. some might not like the "smooth" scroll wheel vs the clicky notched ones in previous microsoft mice (i know some logitech ones have a switch to toggle that ) but i have gotten used to it and honestly prefer it now. another thing i particularly like about this mouse is given that most higher end mice are curved for right hands and i don't really like that that this is probably one of the better mice that isnt curved. obviously if you are left handed this migh tbe something for you to look at. one thing that has a wierd benefit is that it has a glossy finish on the clicking buttons. you'd think it was purely cosmetic but you will notice that dirt builds up on those buttons on most mice and its impossible to remove. on a glossy finish mouse it just wipes off, so that is sort of an added bonus as your mouse won't look permanently dirty.