I have used the aqua-critter by hayward for 3 years now. I love it. Works great. Two important factors, store hose in sections. If you store it put together, it will tend to stay coiled and affects operation. Second, a sand filter to keep the very fine silt from returning to pool. I let it run for a couple of hours every weekend and it is virtually sparkling clean when done. Cost me $90 back then. I think they are $149 now.