First hui, now unfortunately Pooh :-(

At first I was very excited by the robotic vacuum. The programming was simple and worked, the robot went in the end to its charging station, the living room was behind more or less clean (a round robot happens to have no chance to get into corners). While the robot is not exactly quiet, but with us it is to work when no one is in the house, hence the noise level was irrelevant.
The robotic vacuum moves uncoordinated across the room. If it encounters an obstacle, it resets, turns slightly and continue. From time to time it orbits.
The staircase backup actually works - the sensor detects the abyss and stops the robot.
What did not work at all, was the light barrier - once you have the enabled the robot could only circles and has the light closet very spacious bypassed.
Otherwise you have the robot are the same difficulties that probably everyone has high-priced robot also - you have to watch the robots and find out the places where it will hang the first time. For example, he has fit under the bed just for us, but remained centered then hang under the couch. Thresholds have also always placed him still, but he should always suck only the living room with us, that was no problem. Before our chair he is every now and then kicked the bucket, because the chair is relatively soft, so that the suction is not recognized as an obstacle to the chair and put back, but he has repeatedly tried to come forward.
The cleaning of the teat is fine - the reintroduction of the dust collecting container is somewhat tricky, but it works. The duster is attached with Velcro and easily replaceable and washable.
But for long-term experience:
Unfortunately, I realized soon that the programming only 1-2 days work. Then you had to re programieren him again. Once when he was in the evening at 23: 00h suddenly around (the programming was for 9: 00h).
Moreover, the robotic vacuum cleaner was always slower, although I have cleaned it regularly (the assumption was that collected up hair could slow him down). He now travels between only haltingly and sometimes even stops completely, so it has absolutely no more propulsion. I find that very sad, now I can only send him back and there is no replacement.
We will now bite the bullet and invest more money for a robotic vacuum cleaner from iRobot. They have friends of us and work at least years of reliable service.