How to choose the right robot permissive

When a person comes to the idea of ​​“everything is tired of messing up with cleaning, buying a robot”, in front of him is a difficult dilemma of choice among dozens of models presented on the market. The easiest, but far from the most successful choice is to buy a vacuum cleaner robot like friends. Even if they praise their pet and they like his work. It is unlikely that they have something to compare with-no one buys home 3-4 robots to work for a month. Yes, and the “working conditions” in each apartment differ- that the Russian is good, then the Germans are death ..