I hate the layout of the 6gv2. Small left control. HORRIBLE. Huge enter key, which changes the layout of a few keys so you're confused for a while. Or like me I use standard keyboards at work, then at home I have to relearn it (the period, or comma, and the \ key I think). And the right shift is also small.
It's painful for me setting control groups in SC2 with left control on 6gv2. And also using the right shift when capitalizing, say, the letter A. pain in da ass!
Also do not like it for typing. You cant really fly on it (120 wpm) because of the stiffer than normal force. I'd prefer to float/dance across the keyboard quickly than focus on mashing.