Razer mice are a bit of an aquired taste imo. I went from a MX510 to a Razer Diamondback Plasma and it took a while to get used to the change. The diamondback is smaller and lighter than the logitech offerings and not as comfortable. I do like my diamondback, in particular the oversized buttons but I think I'll go back to logitech when they replace the g5. My main problem with the g5 is the lack of two side buttons.