I did this a few weeks ago. I paid full price ($115 not the $135 they say on Scoopon) and I still thought it was worth it. The staff were helpful and informative and tried hard to make sure we had the best experience. My girlfriend is not very comfortable in open water and they looked after her well.
Highly recommended. I'm buying this deal so I can go again.
Mod: Added location to title. Corrected spelling
State location please. Its in Melb.