http://www.lanmaniax.com/maps/html/cs_bullettheory.htm

Too small. Too limited.

I like the basic look of the apartment building, but...

top floor has the 4 hostages - all pretty close together.
ONLY TWO WAYS TO TOP FLOOR. A stair on each end. Not enough routes.

And that basically kills it.
I also noticed that there doesn't seem to be a 2nd floor. You go past it on the stairs, but there is no way into it. THE HIDDEN FLOOR! DA DA DAAAAA!

This could be a better map if it was expanded.