Warning: May contain mild, kinda-sorta-ish spoilers. In other words, they're vague, and I'm pretty sure you could gather all of them from the commercials.
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Yes, I went to see 2012. I was very impressed. The graphics were great; the plotline was pretty decent and more-or-less believable; the graphics were astounding; and it was well well-directed. My original expectations were that it would be an hour of drama, half hour of action, and another half hour of drama. Instead, it was about 2 hours 40 minutes, 95% of which was tense action. It got a little sappy, but had enough deaths (some of which were pretty fantastic) to make up for it.
All in all, it was a very good movie, and that's saying quite a bit because I went into it with pretty high expectations.