The eufy comes in at half the cost of the 4 year old Roomba that we previously used and out of the box, after a full nights charge, it worked flawlessly. The remote is easy to use and after a 2 minute look-over of the manual the thing just WORKS. Roomba would basically never make it back on the charger, it would push it all over our kitchen but never actually park itself correctly. The Eufy did it on the first attempt and has done it daily (unless it gets stuck somewhere) ever since. The Eufy is much slimmer than the Roomba so it is able to navigate some areas that were previously left untouched. The dust bin is always full or near full when we get home and check it, so it definitely is doing its job trying to keep up with our two large dogs and their fur.