I give my buddy the free room I get from my offers whenever he comes to town with me, while I'm staying at MSS. Frankly, I think the Fitz rooms might be nicer than the MSS ones, which isn't saying a whole lot. Clean, comfortable, etc.
Overall, MSS (and the restaurants at the Cal) are just so much nicer than the Fitz, whose public areas and clinetele seem a little down in the mouth. But you simply can't beat their offers. Certainly the best I get anywhere, considering ratio of offer to amount of play.
(What is BOGO?)