Previously, I used several robotic vacuum cleaners (Electrolux, iRobot 2 pieces), but since they all "died" after +/- 1.5 years of use (either batteries, then sensors, then "brains" changed - a little sense), it was accepted decision to stop buying expensive robots. We looked at this Polaris, the warranty period is 2 years, well, we decided that it should work for two years) According to the characteristics, it is suitable - operating time, container volume, suction power, the ability to program start by time . Bought. The first surprise is that it is quiet .). My past robots were much noisier. Of course, it is very convenient to create a schedule for him to turn on without my participation, before our robots were programmed with buttons on the case, this one is through the application. Almost perfectly collects dog hair, sand, which our dogs manage to drag home. In general, while the purchase is satisfied. Let's see how long it will "enough", I hope for a long time.