The 2011 MBP has issues for quite a few users - though some are perfectly happy with it. If you're from somewhere hot, the 2011 may not be your cup of tea.
1. I don't own one of these machines, but there are several threats - some quite long - relating to this issue. You can find one of the best here:
2. Later in the above thread, toward the end, the Genius came up with a solution that seemed perfectly sensible: trade it in for a 2010 MBP, which runs cooler. I have a 2009 MBP, and while this isn't as fast, it's stable and cool. I like both the 2009 and 2010 MBP, can't go wrong with either. Refurbs can be very cost effective.