We have been for the last two years and we did enjoy our time, but it was busy. Teenagers had to wait in long lines for the bigger rides. Adults stuck to the wave pool and lazy river, which were busy as well. Each entry point on the lazy river had groups of people waiting for empty tubes to grab. Thankfully, never saw any snakes!!!
Snack options were plentiful, but again, long lines to get the items and in summer, those Mickey Bars melted before we could get them back to our seating area.
Overall, a nice event, but just set your expectations that it will be busy. Later in the evening, the crowds did disperse, but it also was getting cooler and not overly enjoyable to stand in the evening air in a wet bathing suit.
Also, the busing to the park both times was terrible. Huge crowd trying to get on one bus. Coordinators assigned to the bus area did not have any information on additional buses. First year we caught left form Disney Springs and 2nd year from Bay Lake Tower. I think it was handled by Mears and was not handled well. A guest in an
ECV was waiting near us and when the the bus pulled up we quickly realized there was not an option to get the ECV on the bus. The coordinator also did not know how the guest was going to get to the park. Disney is usually so good with this aspect and yet failed on this occasion. Heading home at the end of the evening was much better because people left at different times, so crowds were not an issue. Also, the coordinators at each bus stop seemed better prepared to answer questions and handle the ECV guests.
Hope this helps.