Efficient cleaner, does pool floor and walls. On some walls it falls off halfway up depending on the pump speed set. But often it goes straight up to clean the tile line. Once it hits air it falls back down in 6-10 seconds. The air-sucking sound can be a little annoying so I don't run it at night. It seems like the longer I have it the better it gets the walls, like its learning the pool area more with time. I have a variable speed pump. I upgraded this to 5 stars now that I've had it over 3 years. It works even at lower pump speeds like 1700 rpm. At first it focused on deep end. But I "retrained" it by pulling it to shallow end. Once it got the route down it was fine. It has some kind of built-in memory system. So far it picks up leaves and dirt with no problem, with rarely getting clogged. Very pleased so far. It doesn't get steps or in-pool seats but I can live with that. Only needed 7 of the 10 hoses. It rarely gets stuck. I have an Avg size inground rectangle pool = about 11'x 30' , 5' deep with side suction port in about the middle. Did not use or need supply bag with control valve, etc. Good product so far. Sometimes it gets carried away with the wall cleaning. Recently it cleaned the tile and broke the air surface 3 times in 60 seconds. That's unusual. It makes this air suction sound when it does but it keeps it clean. But I adjust the valve to more skimmer and less vacuum and that solves that. After 3 years the "intentional bump" on the tires wears down. That "bump" keeps it from getting stuck. So you eventually have to replace the tires. But that's simple. It's a good product.