We used a fishy pool last time, and we still have it, but we're strongly considering renting an Aquadoula... because of the heater. If it works the way we think it does, that will help, because I had a really quick labor with ds, and didn't get hte pool completely filled (five hours, which isn't super-quick, but I didn't accept that I was, in fact, in labor, and not suffering from food poisoning (seriously!) until about 2.5 hours in...).