Do not watch this movie. Andrew Garfield and Emma Stone definitely make a cute couple. They should just produce a romance with them. Wait for that movie instead of watching this now.
The characters seem to loose dimension. The plot between Peter and Gwen is basically:
"I am going to go." - "No don't go." - "Yes, I will go." - "Don't go away", etc. Who wrote that?
And then there are the two villains... Electro is a laughably 1 dimensional character that is simply ridiculous when he is still a human. As other form, he can atleast fight, kind of. The action scenes were actually so bad that I wanted to watch the whole "I will go to somewhere else" thingy Peter and Gwen got going on.
The green goblin is not too bad, however there are so many enemies in the Spider-Man universe, I don't think they should've brought one of the few back there were in the original trilogy. However, I already should've stopped watching when Electro first appeared, so what does it really matter anyways.

In conclusion:
- Weak characters development from the first movie "simplified", terrible dialog, missed potential, laughably terrible villain
+ Cute couple, 1 villain that is not complete %$§&
Do not watch this movie.