I've been visiting the Oxygen Spa for the last year and can talk of the benefits I receive.
When I finish my session my head feels clearer and easier to concentrate but the main benefit is with my asthma, after a session in the spa I barely know I have the condition. Also it helps with joint pain/aches and pains from the gym.
I would highly recommend anyone trying this to have the experience.
The staff are very friendly and helpful and the facilities are kept in good clean condition.