I have used roomba series 4 and series 7 and was looking to replace it with latest generation robotic vacuum this year. Roomba price looks very prohibitive and this one is the closest to it at half the price. It is definitely superior to my roomba series 7 in all aspects.  Unpacking was easy and installing the app on the phone was simple and intuitive. I had it up and running in half 
an hour. Muffling the noise would have been a big pro