I bought this robot on the advice of my parents who have had the same for 9 years! It is robust and it reassured me to know before investing in as much as it is difficult to choose among the multitude of robots ... In addition, I was looking for a robot compatible with a gently sloping pool so that it does not leave the basin when cleaning and it is the case with this one. There is a moment at the water line before diving back along the wall and it is clean after its passage. Anyway ... Good robot. I hope he will have the same life that my parents!