Im using GM since Lion has been a piece of crap and I wanted to drop it as soon as possible (just in time too since about a week before GM release it started mysteriously devouring all my freespace and maxed out my partition causing the computer to be extremely slow, there was around 18gbs completely unaccounted for that it ate, I watched GBs disappear rapidly in Finder then gradually go back up then down without anything open). There are bugs but not as buggy as Lion and is overall better. Lion was the 2nd worst OS I ever used (worst being Windows 98), M Lion is quite a bit better even on day 1.