The Basilisk X is a pretty great mouse. Have used a Razer Abyssus previous to this but disliked the grip as I could never find a comfortable hand position. The Basilisk X feels much more comfortable in my hand, and the battery life is really incredible. To this day, I have not had to swap out the battery even once. The side buttons are kinda gimmicky, because on basically all games, the side buttons just register as "Left CTRL" and not "Mouse4" or "Mouse5". The only minor thing is the pop-out back panel that houses the 2.4GHz receiver and battery: at the bottom, the edge sticks out a bit and can occasionally poke my hand, which gets annoying. But it's not really a dealbreaker. Overall, it's worth the 70-80 bucks I paid for it, and probably the best mouse I've used next to my old Logitech M165.