The Four Seasons is great for service but the room is quite noisy, at least if you are facing the casino side of Mandalay Bay. The droning sound of the HVAC units is incessant. Also, the powered flush toilets causes the pipes to emit a creaking sound, so if your neighbors are flushing alot, expect to hear alot of noises throughout the night. I slept with earplugs and could still hear it.