Go an see it.
Paul Ens, the Director of Lucas Online at Lucasfilm has posted to his blog about how much he liked the film.
http://blogs.starwars.com/ghent/45
If you're a fan of Star Wars, you really owe it to yourself to check out the Serenity movie. Unless, of course, you don't like adventure, excitement, laughter and fun.
Its got great dialogue, the repartee between charcaters, humour and pathos that has been missing from sci-fi for years. Most of the time it seems that people think that the only thing sci-fi fans like on the big screen are explosions, and weird aliens, and taking things really seriously (laughter is out OK!!).
Serenity is great value!