I know this topic has been covered a lot... I'm trying to decide whether to repair a broken sand shark suction cleaner, replace with another suction unit, or get a robot. My main gripe with the Sand Shark is that I'm constantly having to adjust the suction so it doesn't either sit still, or climb aggressively up the walls and suck air. Is there a suction style cleaner that can self regulate the pressure a little better? My main concern with the robots is having to manually put it in and out all the time. I'm afraid it would get old and end up not being used. The suction guy does his thing on a timer and I don't need to mess with it (except when it stops working right due to suction problems). Thanks.