I purchased the 7070 powerbot in September 2018 for $500. Everything was great until September 2020, when it quit working. In order to have it fixed, you have to send it back to the Samsung Repair Center in NJ. (No local place can fix it.) It cost $69 to send it UPS (you have no guarantee if you don't) and then I had to pay a standard $199 repair charge to get it fixed. They replaced the brush, fllter, sensor, and motor fan. 5 months later, after very few uses becasue we were out of town, it is only vacuuming for about 25 minutes - much less than before. When calling again, I am told I have to send it back again to determine what is wrong. I think spending $768 already is enough. Don't buy this vacuum. I loved it in the beginning, but found it to be an unreliable product, as well as difficult and expensive to get fixed.