Exhale is a fantastic spa overlooking Central Park South. The staff is extremely friendly - gave my friend and I an in-depth tour. The waiting area left a little to be desired - it was small, seating was awkward, especially if you wanted to talk to your friend, and the tea/water selection was outside the room and down some steps.
I had a massage, my friend had a facial. Both of us had a fantastic experience service-wise. My friend made me excited to return for a facial in the near future.
Overall, this is a fun place, with great service and treatments and I'd recommend it!