Chirone: Yes, everything is modeled, no bump or displacement on the renders, just a plain lambert.

anasasis: These was about 30 mins... but the render time heavily depends on the complexity on the materials and scene. But usually you get a good looking 640x480 image in 1-2 hours.

Mayaniac: Maxwell does phenomenal interiors aswell. Haven't tried V-ray but my guess is that it's probably a lot faster but needs more work to get a good looking render.