I have to say that I really liked the movie. The previous Spider-man films all did a great job in establishing the motivations and primary characteristically of the villains in the films (outside of Venom), but the character of Peter was always pretty blah and underdeveloped... Amazing Spider-man takes the opposite approach. Garfield does a much better job than Tobi every did, and the film does great job of establishing who he is and why and then taking him through a character arc through out the film, but the Connors' isn't really developed, and the film doesn't to a great job of establishing that there is a Jyckl and Hyde scenario in play and that Connors' and the Lizard aren't the same character. Lizard isn't as compelling or interesting as Goblin, Oc or Sandman were in the previous films, and Amazing Spider-man doesn't do much to invoke sympathy for the character - which I would have thought would have been easy - but the end result is that Peter Park (Spider-man) receive more focus and development than in the other three films combined, which is more than a fair trade off and really is the point of this reboot in the first place.
Emma Stone is obviously a much better lead than that dead fish Dunst, and Garfield and Stone have great and believable chemistry (unlike Tobi and Dunst). The middle of the film got a little bogged down with romance stuff that I personally could have done with less ff... but all the girls I saw the film with loved that junk, and as a result they think this is the best of Spider-man films... so I guess there is some merit in that. Even when I was getting a little bored, I never rolled my eyes and groaned, like when I watched Thor, and Portman was making googly eyes at Hemmsworth... so there is that.
It would have been nice if the Lizard had been exicuted a little better, but I think the end result is great, and I would recommend seeing it in theaters.