I'm a big fan of Divine. I found them through Groupon and got hooked. Their facials and waxing are high quality, relaxing, and moderately priced -- not super cheap (reflective of the quality), but not hotel expensive. I have had multiple therapists, and all have been fantastic (Samantha is my favorite!).
The environment is warm and soothing, and I always leave feeling relaxed. The memberships are a great deal because you get pretty steep discounts for their services, and you can pass along unused months to friends or family (a great feature).
Highly recommended for a day spa!