Expensive, certainly, but he has cool functionality; he sees where he is going, he doesn't get caught and he doesn't crash anyplace; in addition, there are enough sensors to prevent him from falling down the stairs. The benefits of it include: It's fantastic how well the vacuum cleaner works with carpets; when you switch to the special mode, it lifts a napkin on the carpet to indicate that it's done its job. The vacuum cleaner is quite strong and has a cool navigation system. to avoid doing him any harm. It is unfortunate that there is still no basis for self-cleaning, as my vacuum cleaner was unable to function properly without it; yet, accidents sometimes happen.