'Just plain awesome,' says Brandon Sanderson n the front cover, and I'm inclined to agree. Sins of Empire  is stuffed with action and memorable characters, and builds a world where Privileged Sorcerers face off against powder mages, with (heh) explosive results.
   I think there's a sequel coming, and if there is, I shall be keen to read it.
  I did find a handful of typos, which you can see by clicking on the errata tab of my professional editorial site (just to the right of this post) if you've a mind too. But overall, I thoroughly recommend Sins of Empire .