I enjoyed it, I thought the speech she made at Tim Shaw was a bit on the nose about change, dealing with things being different etc. blah blah. It felt like a written apology to the fans who've been up in arms since the announcement of a female doctor. I feel that if it were made 5 episodes in, or by a previous doctor it would have had a very different tone.
I always take a few episodes to get accustomed to a new doctor, I felt fairly comfortable with her by the end of this first one. I really liked how this wasn't a save the world/universe' episode but actually a 'save one person' episode. I find more merit in episodes that are more personal like this. There have been entire seasons dedicated to saving the universe in the 'new who' and it does get tiresome when everything is always on the line.
I'm hoping we see a male Master rock up and be all confused by her, before becoming Missy.
I look forward to next weeks episode, and the one after that. etc.