I was a little concerned at spending this much on a mouse, but my concerns flew right out the window a few moments after I started using it. It fits my hand perfectly, it tracks like a dream and evey single click is recorded no matter how fast or slowly you mash those buttons. It also is absolutely immune to Logitech's click bounce issue that plagued both generations of the G903...

A lot of reviews that I saw for this mouse prior to buying it say the mouse it heavy, I dunno what they're on because this thing is really light! I ended up putting all three weights in and it feels great.