I have been to Ultimate and Serenity.
I went to Ultimate and the girl I got stuck with was like 220lbs, and was terrible. She gave me a massage for like 20 minutes, then she gave me HR and it was clean up and out the door. I wouldn't recommend.
Serenity is nice, for what it is. Every American girl place that I have been in is the same way. There is no shower, just a straight massage. The thing I don't like is the fact that they charge you more to touch. I have been there 3 or 4 times, all the girls have been decent, two were really cute.
I have been to another place in that area, right around Ultimate that was in a tanning place. The girl there was cute and gave the same typical service. I would stop back there but I don't like having to go that far off the highway when I am traveling back home.