I have not been to the Poly, but we just returned from the GF. The waterfall pool also has a waterslide. My DH tried it and said it was fun. I saw kids as young as 3 or 4 y/o coming down. The waterfall is at the side of the pool about 10 feet wide. The pool wasn't very busy the evening we went. It is open 10-7 I think. The water was warmer than the main pool. It is also about 1/3 to 1/2 the size of the main pool. It has at least two lifeguards that I could see, a couple of cabana type enclosures, lots of chairs, a area of water shooting up from the area around the pool for little ones, towels, food service. It has a zero entrance...kind of like a beach. My DD7 is a water bug and loved both pools.