I travel to Vegas fairly regularly from southern California for business. I've tried most of the spas up and down the strip and believe me some of them are really pretty spectacular but fancy doesn't always mean good quality.
A concierge mentioned this spa as being of great quality and a reasonably priced. I called for an appointment on my next trip. The place is small compared to the larger resorts but the secret is that they have great people there. My massage was the best I've ever gotten and I've had more than a few. It was so good I booked ahead for the next time I was comingback to town. tey also managed to squeeze me in for a gentlemaan's facial.
They may not have all the fancy trappings that you can find the strip but for a good massage this was worth no steam room. I can get that at the hotel but a massage for under a $100 that is better than any strip facility is worth it.