Overall I thought the movie was good... not as big as disappointment I thought it was going to be weeks up till the release. The movie feels a little short and things rushed just a tad... but everything fits well together (especially if your not rooted in the comics... if you are... you probably will grip some).
I agree with one of the previous reviews... the special effects were great in some parts but others looked really bad. For instance scenes with bone claws looked great all the time... but some with the metal claws looked pretty fake.
Its no Batman Begins or Dark Night... but I think its as good as Ironman and way better than X-Men 3.
Its def a good movie worth seeing in theatres and then later buying on Blu-ray :)