I thought the episode was fantastic, much better than the previous years. Matt Smith was born for the role, watching him trying to battle inner conflict and the urge of curiosity was brilliant.
The Sherlock reference was very funny too, a nice tip of the hat to Moffats other super show.
The TARDIS interior is amazing looking, functional and much more like a time craft, not a junk yard scrap heap. I can't wait to see more of it, it seems much narrower and smaller than the old, but with the stairs rails there must be more underneath.
Clara is already very intriguing, an unusual companion story and like all of Moffats women, strong headed and a nice match for the Doctor.