Went to Santorini Water Park (next to Santorini Shopping Centre). A lot of the water slides were not working, the wave pool had no waves, the restaurants had sold out of food (mind you the place was empty), entry fee was more expensive than nearby Black Mountain Water Park.
One could easily believe that this place was going out of business as the place was clearly not being maintained. We complained about all this to the staff and gave us a partial refund as a result.
Don't waste your time going there, Black Mountain Water Park is nearby and all slides and wave pool is operational. And there is food in the cafe!