This is really two different movies hacked together.

Rating: 5/10 (6 December 2011)

This is really two different movies. The better movie featuring the excellent actors, sets and special effects basically are entirely in Asgard. The lame movie features basically bad actors, (Gregg is OK) a boring set and no drama down on Earth.
When Loki sends the attack to Earth--who really cares? There is no one in that sparsely - populated small town to be threatened. (It needs to be set in a larger city.) The Earth-based story/dialogue is boring. (Compare how much good small talk/character development someone like Lawrence Kasdan could write into that space.) The love interest just falls flat. When she is separated from Thor, no one really feels any loss there.
However, the acting and sets in Asgard are worth the price of admission. Hemsworth is perfect, although they should have written more "fish out of water" stuff for him. Worth a rent for the "good movie" alone.