The SPA in T5B, when I was last there, 10th Jan 14, only had one therapist, and while there were 2-people on reception, neither seemed interested/able to make a booking for a treatment.
Fortunately I managed to capture the therapist between treatments at the 2nd time of asking, and the only thing on offer was the new chair which was OK. I wasn't offered anything else, and no one was around after the chair finished to offer a drink, samples, and complete the questionnaire.
Overall very poor