Incredible!!! Purchased my ticket online through Viator and printed off the voucher prior to leaving Australia, so the experience was locked in for the dates I wanted. I checked daily for the price of the voucher prior to purchase,as the exchange rates vary so I got a really good deal on my day of purchase, without all the added tax and service charge. The pick-up and drop off at your hotel is really great to have locked into the total cost, and he arrived earlier than the arranged time. The people at the service desk on arrival at the Grand Mirage were so supportive of my claustrophobia, trialling the helmet on me several times, until I was able to wear it without falling apart.The men that take you down under, to walk on the floor of the Indian Ocean, are so down to earth and supportive of every individual. I suffer claustrophobia and couldn't have done it without them being there for me, without neglecting the other participants. It was my friends birthday and they even gave her an underwater birthday cake for her special day. There is nothing that I can compare with this experience. If you want to enjoy something really different and have a memory of a lifetime. Do this! Brilliant, walking, feeding and touching the fish. I highly this experience to anyone.