With how poor my experience with Razer mice was, I'm just baffled with how well they score on Tom's...
But then I have to remember that these reviews don't cover the durability of actual ownership, which is where these things fail, from my experience.
I went through several Razer Naga playing WoW from post Burning Crusade to Warlords of Draenor, after which I switched to a Corsair Scimitar and ran with it all the way to that pre Battle for Azeroth event with Sargeras' sword jammed in Silithus.
Over time, every time, without fail - the dreaded double click, and the design made it impossible to even try to clean the interior, which likely would've fixed that crap.