A friend of mine managed to snag some preview passes. I saw it on the 14th.
I have not read the book, so I can not compare the two. However, some books were handed out as prizes, and they look significantly thicker than the screenplay would have been, so I'm thinking a lot was cut out.
My verdict: plot by the numbers.
A couple of minutes into the movie I had a mental checklist going on in my head, ticking items off as they happened, in the order I expected.
Youthful hero? Check.
Cute girl taken prisoner? Check.
Mysterious stranger who appears to know more than the tells? Check.
Parent missing under mysterious circumstances? Check.
Parental figure dying? Check.
Fleeing home? Check.
Discovering secret about the mysterious stranger that is so obvious he might as well have worn a sign? Check.
Argument with replacement parental figure? Check.
Leaving replacement parental figure in a huff? Check.
Parental figure sacrifices himself to protect the hero? Check.
Someone who looks to be suspicious and with a dark past turns out to be okay... proving you can't judge people too quickly? Check.
Etc, etc, etc. While not a bad fantasy movie (so long as the 1st D&D movie and Krull exist), it isn't anything exciting. A standard "Fantasy world stands in for the coming-of-age situation that all young men go through" plot.
I suppose I might have liked it a whole lot better if people hadn't been reminding the main character how special and important he was every 5 minutes. I prefer my heroes to be "How the &%@# did I end up here?" kind of guys/gals.
Still, go see it if you want to. Make your own judgement. Enjoy the book if you've read it (and I have a hunch the book is better.)