The Steelseries' thumb keys are, honestly, an improvement over the Naga. While in theory it sounds great to have 12 thumb keys on a mouse, in reality, it's not useful to accidentally ice block mid bossfight instead of casting your trinket cooldown. Having only 4 thumb keys, I don't make any errors like that. Plus the other mouse's thumb keypad is so small, my husband can't use it. My husband can easily use the thumb keypad on this SteelSeries mouse.