Trust your fellow yelpers on this one!
Such a relaxing place to spend the day! The $45 entrance fee (if you are not getting any treatments) is worth it! I don't want to give you too many details to not spoil the experience, but this spa is spacious, and the snacks/drinks are generous. Go a little early and use their gym, not huge but they have what you need to work up a great sweat before you lay on your butt all day.
The ONLY reason I am not giving this place 5 stars is because I went to this place twice in one month, used 2 different showers and neither of them drained very well. When going to a luxury spa, I like to use ALL the shower heads/sprays etc and with these, you can't do that if you want them to drain properly.
My advise is to go early (before 11am) if you want to secure a spot to hang...the nice heated chairs in the Roman Bath area go fast!