I am currently downloading OS X Mountain Lion onto my sweet little MacBook Air. It's 4 Gigs, it's going to take a week on our olde worlde rural broadband.
I can't think of the last time I upgraded a computer knowing as little as I do now about this update. Somehow there was a time when I knew about this stuff, maybe I should correct that to, 'was interested' in this stuff.
I've given the comments on the App store a mere cursory glance. 'It's rubbish' and 'everything on my Mac exploded and more than balanced by 'brilliant' and 'the best update ever in the history of the entire universe.'
If I never post on Google + again, that's because the MacBook Air went ppphhhhtt!