Not bad.
If I wasn't familiar with all the games already out there that are identical to this one, I'd be very, very impressed. It's a well-polished, easy-to-use game. Not quite so easy to learn, maybe, but certainly easy enough to use once you get everything figured out. Also, it doesn't take oodles of waiting time to accomplish much. A lot of builders make you wait several minutes (often more) to do anything. I get a feel similar to Caesar from this.
A few serious caveats, though... First, the lack of view rotation (a small thing, really). Second, scrolling the screen with the keyboard deselects a building type (annoys me greatly). Third, clicking the upper right corner of the screen results in a "cannot build" message. Forth, dragging on the minnimap does nothing (you have to click to move the view- a minor annoyance.)
Could do with more content (more buildings, really). Perhaps a metalworker/jeweler to make you gold from your gold? A constabulary/guardhouse to compliment the dungeon? And perhaps a inn to make money on traveller from other kingdoms, etc? On thesubject, why not make an advanced variant of every building available for the paying types and make those already available perhaps a smidge cheaper, maybe?
All-in-all, not a bad game.