We had the Phang Nga bay tour on a speedboat, and Sui was our guide. The tour was excellent!
At the assembly area, Mark first oriented the whole tour group on what to see and what to expect -- this was really appreciated. They provided towels should you have forgotten to bring one. We managed to see a lot of different places, there was just the right amount of activity, and the food at Panyee Island was great! On the speedboat there were fruits and cold drinks served as well. We were provided some items to use as needed, such as the flashlights for the caves, a waterproof bag for our valuables, beach mats for the beach. (These have to be returned okay). This still shows how the company takes thoughtful care of the people on the tour. The tour costs more than other tours but it's an experience you won't regret taking.
Tips: Bring extra money, to tip the kayak/canoe guy, to tip the tour guide, and to buy beer (50/can).