I finished Brandon Sanderson's Warbreaker today over lunch. And it was really a fun book that kept me guessing all the way through.
At no point was anyone what they seemed. At least not to me.
I also really enjoyed the magic system that he created. It differs quite a bit from the metal-based magic of the Mistborn series.
Finally, I was worried for the last half of the book that it was goign to end up being a multi-parter, but Sanderson tied everything up nicely. There is the potential for a sequel, but no major points in Warbreaker are left hanging that would require one.
It gives me even further hope that Sanderson can tie up Robert Jordan's Wheel of Time story in an interesting way.