Saw it. Twice. I wanted to write a real review, but somehow, all that came to mind was a bunch of pull quotes:

"A witty and fast-moving Star Wars for a new generation."

"A giddy pop-culture explosion, Star Wars by way of Shaun of the Dead."

"Spacefaring SF has always been firmly rooted in the tropes of the western -- the mighty Star Trek was originally conceived of as "Wagon Train in space." Serenity takes the western concept and gallops merrily away with it, with supremely entertaining results."

"Funny, scary, even heartbreaking -- Serenity succeeds where other recent SF offerings have failed by being about authentically human characters, struggling to survive in a compellingly grubby and lived-in futuristic universe."

"You know what Joss Whedon likes? Joss Whedon likes diminutive girls who kill monsters with big axes."

"A ripping SF adventure yarn with heart and humor."

"The only thing Serenity is really missing is, sadly, a memorable theme song. That's a shame, because it would be much more likely to become an instant classic if it had one. And make no mistake -- it deserves to become an instant classic."

"Wow! SF that assumes I'm intelligent enough to follow an actual plot and keep more than three characters straight! Be still my heart!"

"I can't say I was entranced for every single moment. But I can definitely count, in mere seconds, all the times that I wasn't entranced."

"Packs enough story into a two-hour movie for a whole season of a television show. And that's a GOOD thing."

Okay, so, go out, make it a big hit, ensure that we get a sequel. Do I have to tell you twice?