*raises hand* Firefly fan here! Wasn't disappointed. Was rather on a Firefly-high and wandered around the town wanting to fight a revolution and generally consider it the best movie I've seen since ever. They changed Simon's characterization quite a bit, which is the only thing that might have been a disappointment, but it made sense for a movie that was supposed to appeal to people who haven't seen the series so I'm okay with it. Also am a Farscape fan, but evidently missed the Farscape similarity altogether.