Michael Bay wanted to make up for what he had done with Transformers: Revenge of the Fallen, and he clearly has. Dark of the Moon is the sequel we wanted!
The robots have much more screentime and are given moments for character and drama to play out between them. The film doesn't has as much action as the second film, however the action is much more exciting and has a meaning to it because of the film's great plot that adds a twist to the '60 spacerace between America and Russia.
Those that have Blu-Ray must watch it on that format. But this first edition is more of a rental. There will be an edition coming out around Christmas that will be packed with bonus content and will fetaure a 3D version of the film for the lucky few that own a 3D Home Theater system.