Oh, I just watched tonight's (2nd one) on iPlayer and I thought it was good.
The first episode I thought was ok. The Doctor being zany after regenerating got a bit tiresome and him going back to this now (conveniently) kissogram girl he's been grooming for 12 years seemed a bit dubious and on the whole I thought Matt Smith tried to hard with the quirky.
The convoluted plot in episode 2 has left me wanting to watch it again and I thought both Matt Smith and Karen Gillan played it really well. Matt smith seemed more relaxed but also more powerful and ageless and Karen Gillan appeared to really get into her roll, more feisty and confrontational and also wise in her decisions.
She is obviously already thinking quite frivolously about her impending marriage to the tedious geek from the first episode which implies another doomed romance but, hey, time travel will do that to you
PS. Of the new lot I think Christopher Ecclestone was the man. Very scarey
Of the old ones Patrick Troughton and then Tom Baker