Pretty cool. The repetition isn't terribly obvious when you break it up like that. Anything that makes building a city easier is wicked awesome.

The only issue I'd have with using something like this is that there isn't any "organization" to the buildings. I was trying to imagine some way to change that...but can't with a repeating tile. I think you'd have to do something more like the "geomorphs" TSR and some others came out with back in the day.
M