Full review here. Said to be a cross between Dungeon Keeper and Dawn of War, it is clearly not a Dungeon Keeper clone and plays nothing like it.
A decent game in its own right, Impire walks right on the line of average with numerous design choices dragging it down, mediocre and limited base building, tedious micromanagement and the current instability of the game causing frequent crashes, making multiplayer nothing but a time waster (As you can not save or drop-in).
On the plus side, Impire is a really charming singleplayer experience with plenty of detail in the map and atmosphere department.