How long is the tour and what time is the pickup from Waikiki Sheraton? The description did not mention a time and I could not understand the agent from aviator.

Hello, has anyone encountered any problems using the groupon voucher for a specific date. We can only go on one specific day, visiting from the UK and hopefully plan to use this voucher. Many thanks

Getting through the doors of the submarine was difficult for my husband with back and leg problems and for myself with a foot that I have to wear a brace on. Once we figured out how to do it, it was okay. This should be pointed out to people who may have disabilities. Was a very good tour and well worth it. It was not crowded the day we were there, so we were able to take our time.