How hard is it really to get used to the buttons on the side? Is it hard to know which one you're hitting? Do you often hit the wrong one? Is the mouse really as small as the QQ gallery says it is? Do you have to look at it to know which button to hit on the side? How does it stack up vs. the Blizzard endorsed WoW mouse? Is the price difference worth it for one over the other?
That's about it for now. I'm looking into getting one and just want to make sure I'm not going to be blowing cash on something I'll regret buying. Mainly I play WoW as a healer and tank, PvE only.