I am wondering if I should upgrade from Snow Leopard to Mountain Lion. After Lion came out, I was going to upgrade, but I never did because of some of the stories that I was hearing about people switching back to SL. Also, I use Spaces and expose extensively and when I saw how Mission Control deals with spaces and sticky corners from SL, that kind of finalized my decision to not upgrade. I have a 2010 MBP, i5, and 4GB of ram so I'm not too worried about performance, I'm mostly just concerned about productivity and usability of the OS. I don't mind change, unless the change is backwards rather than forwards. Has anyone that stuck with SL tried the GM of Mountain Lion and made a decision on upgrading or staying with SL? If you have made the decision, would you mind sharing some of the details on why you are staying with SL or upgrading to ML? Thanks!