I loved it, personally! David Tennant and Catherine Tate felt like they'd been away for a month or two rather than 15 years, and it's so nice for Doctor Who to just be fun and funny again.

I know some people didn't like the "let it go" resolution, but also that's just Russell T. Davies I think. You get utterly bonkers ideas (Beep The Meep on primetime TV as a big comeback monster!) a political point of view that he's not afraid to completely smash you over the head with, and an out-of-nowhere hand-wavy resolution that fixes everything (remember when the Doctor became flying space Jesus and then they erased the human race getting genocided back in the day?)

Also I loved the conversation in the cab:

"How's Nerys?"

"She's fine."

"Since the accident?"

"She's not fine."

"It was her fault."

"She's been fined."

ALSO I really like the new TARDIS interior. Someone on another site described Tennant running around it as like a dog with the zoomies lol.