Hate to be “that guy”, but I bought one in July. It stopped working after a little over 90 days, constantly stopping and complaining that the main roller has a problem. I own another Shark robot that is not a refurb and is still going like a charm after two years. Just saying. One of the issues with this model is the weird, removable stick vacuum in the charger makes the charging base a bit wobbly, making it more difficult for the robot to get into its dock properly. All in all, I’d avoid this particular model, especially a refurb.