The advantages to owning a robot cleaner include their self contained filter, which is easily cleaned. They also do quite well with their coverage. Some units are computer chip controlled, and some even have remote controls so you can steer the unit from a lounge chair! Being that they are the only cleaners not attached in any way to the pool s circulation system, they produce no resistance or back pressure on the filtering. Their cost can be more than suction or pressure side cleaners.