We were skeptical about robot vacuums even though our daughter recommended one. We did our research and decided on this one. We have had it for two months and we are surprised at how well it cleans. The only drawback is that touch ups are needed as the vacuum is unable to clean corners and certain areas near some furniture. Even with those small drawbacks, lt saves over 2 hours in vacuuming time!! Our daughter has the other main name brand robot vacuum and the Shark Al outperforms it.