I've had Robby for many years and now have Roberta. Both of ours came from Woot and were refurbished. The cost was far less and Robby is almost 8 years old. I still use a vacuum twice a week and depend on the two robots to get under the beds, couches, and places it's difficult to vacuum without moving the furniture. With two labs and an occasional foster pup, they are worth every penny we spent. We have a combination of tile, wood, and carpet. They scoot around without any difficulty.
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