I've stayed at both the Venitian and Mandalay Bay and the rooms at the Venitian are alot nicer IMO. Mandalay Bay is at the very end of the strip across from the airport so expect a little more helicopter and airplane noise but it is a nice hotel. It has a pretty cool wave pool and beach. Wear your sandels if at the beach cause the sand gets extremely hot. The Venetian has multiple pools on the roof which is sthe 4th floor. The Sands convention Hall is conected to the Venetian so if there are conventions going on at the time it may be quite busy in there. The Venetian