I quite enjoyed it. Big and dumb, and a lot of fun. Definitely some warts on it, but overall a pretty good antihero sci-fi flick. Great effects, cool visuals, kick-ass fights... a wicked hot female lead. Not much not to like unless you've got a hate on for the Vin man.
The ending was ripped straight out of Conan, but despite all that I came out with a grin on my face. It was no Star Wars, but it was no Wing Commander either!