Bought an i7 + a year ago and very happy with it. Has a dog shedding some. The Robot Vacuum Cleaner is great for vacuuming both fur, rabbit rabbits, black rubber knots from the artificial turf, bread crumbs and small ash from the wood stove. Runs over the door thresholds without any problems.
Works with Google Home too. "Hi Google, start the robot vacuum cleaner" and hiccup it's up and running. Have done some research with IFTTT too, so now the robot starts every time I leave home. Quite fun. The best thing has to be that it empties itself. I don't have to think about anything. The robot tells when it wants attention through the app.