I came here to just use spa facilities, and was slightly disappointed. I had been to the Palazzo spa before and thought that the Vdara spa would be similar. However, it was much smaller and I didn't really see anything that made it any better. One plus was that it was pretty much deserted when I went and I got to enjoy the jacuzzi, steam room and sauna by myself. It was also very clean.
However, at $28/day I would look for another spa faciity before coming back.