I absolutely love my S9+. I was skeptical at first, as my previous robot was awful, just moved the dog hair around and never actually picked anything up. I was hesitant because of the cost of the S9+ but decided to go for it, and I'm so glad I did! He's very efficient and does a better job than I could even do with a regular vacuum. I love that he has an accurate map of my home, and doesn't miss a spot. There are no longer dog hair tumbleweeds rolling around, and I even have to dust less. The app is user friendly, and the fact that it emptys itself is a life saver. He runs while im at work, and I come home to a spotless floor. I would and have recommended it to practically everyone and I am now a roomba user for life.