Yeah, I am a Joss Whedon fan-boy, but I just finished watching both seasons of Dollhouse. I will say that my expectations were low -- I was sort of expecting a revamped Alias with various weekly missions, with the highlight of having Eliza Dushku rather than Jennifer Garner.
The first 3-5 episodes were entertaining but really fell right in line with my expectations. After that, the show got much better. As a whole, the entire show is like a long essay on the banality of evil.
The pace gets a bit crazed at the very end, but that was because Whedon working in three or four years of planned plot development in half a season when he found out the show was being cancelled. A couple of other random notes -- Whedon works in a fresh high-tech take on zombies (really, it makes sense in context) in the season-ending episodes. We also get a couple of guest appearances from the new first lady of sci-fi TV, Summer Glau.