2x2.8 GHz '08 Mac Pro w/12 GB RAM and Intel SSD for System. OK, I did the upgrade to ML as I was hoping that it would be a better experience than Lion. Well ... With my ancient HD2600 Radeon the scrolling actually seems a bit smoother even as Mission Control feels far more clunky. Jury is out. My two different Apple IDs caused some interesting problems with iCloud. Still trying to sort it out. Jury is out. Kernel panics .. now three in a few days waking up from sleep. Bad. Any others experiencing panics and graphics issues?