I have very little experiance but I can say that my 10 year old or older polaris 65 (used came with the pool) still is working. It needs a new float hose and the bag has to be replaced once or twice a year but I have several trees around the pool and it has gathered bags and bags of leaves acorns and small sticks (we never cover or close the pool). It is not fast or smart but it is way better than manual vacuming. It gets 95% of the big stuff. I called customer service today and they were helpful, yes after about 5 minutes I spoke to a human! I would definitly buy another one.