The story was a little weak. I think there must have been about 20 minutes of actual plot over the 2+ hours of programming. Actually, in retrospect, the story was quite good, but just far to drawn out and over complicated with techno-babble.
As for the ending... it was lazy, schmaltzy and nice!
I shall now go into spoiler mode:
So yeah, I think in the end the plot was quite good, but contained far too little meat to be fleshed out over two hour long episodes. It could have been much better had to build up dealt with better in part one.
I liked the idea of the power mad Time Lords trying to save themselves at the expense of the rest of time. I didn’t mind the whole thing with them using the Master to a link, although IMO it could have been written better/clearer.
The stuff with the Doctor and Wilf was a little odd, they’ve only meant a handful of times and you’d think they were best buddies. As for the subplot with Donna… that really didn’t go anywhere. I was also getting a little concerned with the Doctor’s love letter to the Master… “you are so beautiful…” I swear I thought they were going to start to make out. Wouldn’t have surprised me either.
Heavy use of deus ex machina was on display again - Rassilon literally undid all the Masters work with a flick of his magic glove.
Am I the only one also thinking that the Time War sounds amazing? Things like the Nightmare Child? I was hoping that the Time Lords would have been successful and then we could have had a solid season of the Doctor involved in the Time War again.
I did like the thing with Wilf knocking four times, that was a nice touch. Although the Doctor freaking out seemed a little out of character.
The last twenty minutes… I am really torn on it. It was sooo cheesy and aimed to tug at the heart strings… but it worked. Had I not been such a cynical man I might have had a tear in my eye (nearly did in Avatar as well, must be getting sentimental in my old age). It was good to see all the characters again and have everything tidied up for when Moffat comes in, although I did liked the shared universe and the life after the Doctor for companions that RTD created and hope that isn’t forgotten about.
Also, the older lady Time Lord Wilf kept seeing… the Doctor’s mother or Donna?
While a sentimental ending was nice, the Doctor’s method of passing was bitter sweet. Survived the Master and sending the crazy Time Lords back only to die from radiation poisoning (which has happened before).
Matt Smith… while I am looking forward to him in the role, his regeneration was a little too much like David Tennant’s thing with the whole “new teeth”. Hope when Moffat writes the character he’ll have a totally different personality from the 10th Doctor.
Okay, enough rambling from me. Over all it was a little bit messy, but I suppose it was a good bow out.