I decided to check out Thai Spa last night when I drove by it on Eastern. There are a lot of sleezy massage parlors in Vegas and generally you can bank on Thai massages being more "legitimate".
This was hands down the most amazing, therapeutic massage I have received to date. The masseuse was extremely knowledgable about the body and somehow found and absolutely crushed every muscle that was already soar. You need to experience a little pain to get the most out of a thai massage and let the masseuse really work out each not and tight muscle.
I have two lingering injuries: one in my neck, one on the outside of my left knee. the masseuse effectively loosened up and helped release the surrounding muscles that were pulling on these spots and even gave me advice on muscular imbalances that I have and how to correct them with unilateral exercises. For example, one particular disk in my neck/back can get out of whack every few months and makes it hard to move my head. She found an extreme imbalance in my trap and told me to work traps first in my workouts, stretch them, then move on to chest, lower lats, and interior deltoids so my traps won't pull on that part of my neck.
Overall, very impressed with the knowledgable staff and massage. I highly recommend this spot.
The only downside is the price (70 per hour). I will gladly pay this anytime for the quality of massage that I got.