I stayed here while attending an industry conference in April 2010 and was happy with the cleanliness, however the rooms, as others have said, are dated. On check-in I tried slipping the guy $20 between my ID and credit card and asked if there were any "complimentary upgrades" being offered, but he quickly handed the J-note back and after ferociously typing for about 10 seconds told me that they were going to give me one night of my three for free. Sweet. Too bad my company was paying :(. I ended up on the fourteenth floor in the west tower. Not bad. The room was nothing to write home about, but it was decent.
***Note to self for the next time: do not confuse the pyramid rooms with the tower rooms while completely tanked or you will be helpless lost for over an hour. Also, make sure to throw up down on to the casino floor again from the pyramid hallways. That was pretty great.