This is a nice spa. The downfall: it is an older spa. The newer spas,like the ones at Aria, give the spa at Bellagio a run for it's money. The service at the Bellagio is very friendly. The showers and amenities are lovely. There is an area for Jacuzzis and a cold dip. There is a sauna and a steam room. Inside the spa, there is a tranquility room. It is a room that one can go to after their treatments, although one can request to go there before their treatments. It has waterfall sounds along with different lighting changes and the light is turned down in order to allow for relaxation. I had the Bellagio signature facial which was quite nice and I had a very good esthetician.
So what is not as great: As already mentioned, it is an older spa so it is still crystal clean but there is an older feel to it. The tranquility room was a letdown. I was at the spa a few years ago and the tranquility room was incredible. Some changes have been made to the room but the biggest issue was that the room was way too warm and that was not comfortable. As well, there are not many beds available so it is hard to get a bed or Long chair to relax in. The worst part for me is the sheer amount of people that were there. We started our treatments at 1 PM. At 3 PM, the spa was completely full. There were way too many people to truly relax. Also, be aware that inside The spa, from the waiting room inside the spa to the tranquility room, it is coed so men and women are all equally present in robes.
It is a nice spa, but it is not a phenomenal spa. Having had the privilege of going to many spas in Vegas, this is very average to me. I would want to go back if there we're only a few people and I could actually relax.