Yeah, I use it for buildings in my architectural work. Have done for about 3 years. Great program for working up interior spaces/ any space really. Once you get used to it, and its block system (key point to learn for 3d modellers using it) its really nice, gets me to a level system rather quickly.
I tend to follow up with Lightwave 3d for poly optimising for games, and any "organic" shapes, like frazzle said.
Only problem is google's splitting it into free and expensive (relatively) versions. The free version has one limitation that will stop it being useful for indie's: namely, it won't export to those formats. Rather annoying - should be a limitation on complexity, so as not to harm those of us working on free projects at the moment

Still, as I said, I have a proper copy with work, which keeps me happy, just doesn't allow me to reccomend it as much anymore.
Don
have a great day