It pains me to say it, but I'm going to have to vote "awful".
After about 20 minutes, my mind was wandering. I was BORED...and I've only ever happened once before (Love and Monsters)
Matt's performance was poor. He was emotionless, and when he did try to convey emotion, it was utterly unconvincing. He saw the Daleks and just
stared at them...he's supposed to be TERRIFIED of them. At times, I felt he was reading his lines off a script, rather than acting.
The Daleks, whilst it was nice to see them with lots of new colours, they were generally pointless in this episode. Presumably they'll return for another series finale.

But it was a refreshing twist to see them survive.
I absolutely LOVE Amy/Karen, but yet AGAIN she is the hero of the day. The Doctor is supposed to be THE ultimate power, but Amy's bailed him out twice. She's making the Doctor look a bit...useless.
And seeing the universe crack at the end of every episode is already repetitive. I knew it would appear when the TARDIS went away, and hey presto, there it was!
Rant over. I love Doctor Who, but I don't think I've ever felt so disappointed by an episode!

I hope it's just a blip.