What can I say? It was awesome. Rather sad as well. You spend the whole episode wondering just what is going to kill him (and there are a few times when you think it'll happen). The cause of death wasn't expected (by me). Uhm... Pretty much everyone appears at the end of the episode. Martha, Jack, Sarah Jane Smith, Rose, etc. which was sad as he says goodbye to everyone with good deeds. So far, Matt seems to be trying to act like David, which I hope is just for that scene. I want him to add his own identity to the character, then copy him. I thought Donna would die. She doesn't, so i'm confused. Looks like if she remembers him, then she'll go unconcious or something. Oh, and releasing a deadly radiation type beam that spreads outwards from her brain.... How the Time Lords appear is rather odd really, and of course, they don't suceed in coming back.
Can't think of anything else to add.