Very Good but not Essential
This mouse has a lot of flashy gimmicks and is very nice, but it isn't worth it unless you want the lighting or design specifically. The materials feel great in hand, it's light, and the sensor (while unnecessarily complicated) works perfectly.
--Lighting is flashy
--Rubberized coating on the sides is nice and grippy, especially compared to the Rival / Sensei 310
--Three side buttons useful for games..; kind of
--Adjustable weights are handy and work well
--Soft rubber cable doesn't get caught on surfaces and bends easily
--Light
--Very...
--Overpriced for what you're getting (a good sensor and some lights
--The forward-most side buttons is hard to press for everyone but the largest handed
--Super low LOD may be useful for few but other mice LODs are honestly low enough.