Love love love Body Blitz! The water circuit alone is amazing (if you don't try the freezing cold pool you don't get the full experience - yolo) but the massages and scrubs are great as well.
Staff is very friendly and everything is ridiculously clean (robes, towels, facility). The shampoo, conditioner + body wash that they have for use in the showers smell so good and they have them for sale at the front. The place alone is very calming and quite pretty.
Try the chai tea iced latte with honey during a circuit and your life will be complete.
If you are uncomfortable around other naked women, I wouldn't recommend it, but you'll be missing out.