I have owned a few different companies' robot vacuums and so far, I am liking this one a lot more.  It has some great features that some don't have like the bagless dirt bin, and washable filter while others are costly replaceable parts.  The unit is also much quieter.  My hang up is the software is a bit wonky, I don't seem to be able to go back in and set room that I don't want vacuumed and I really need to set its boundaries.  I don't want it in the bathroom and don't want it around the tree.  If that feature is there, well, where is it?  And if I needed to use the magnetic strip, then this model didn't come with it while the cheaper model did.  Yes, we own two, a cheaper one for downstairs and the better one for upstairs.  It runs under the furniture saving us from wasting Swiffer wipes.   Even with the funky software, I have liked this unit so far compared to the others.