I thought Serenity was pretty good. I mean, I don't think it's as good as Firefly, as it loses some of the charm and western feel, and Shepherd Book's role was painfully small, it's still a very exciting and enjoyable film. But Randy is right in that the narrative does fit the small screen better. It's just too hard to encapsulate such a large plot into a one-hour and fifty-nine minute movie.

EDIT: It definitely works ten times better if you're already familiar with the show.

And only ONE SEASON!! Ya know how when you like a show a lot and you go back and watch the first season and it's usually pathetic and weird and a mere shadow of the good thing it eventually became??

Hell, it wasn't even a full season. It was only half a season, and it begs the question of what more could have been done. But, on the other hand, having only fourteen episodes makes each episode feel that much more important. If you had 150 episodes, then some of them (probably only a few) surely just would have felt like just another episode.