We loved our I Robot and it worked well my wife affectionately called it Carson from Downtown Abby.We had a glitch shortly after purchase but the company solved our problem . After 14 months of ownership Carson stopped working , customer support said I needed a new main body but since we were out of Warrenty we had to pay ( to be fair a discounted amount) but only slightly less then buying a new unit. I have all the pads and fond memories of Carson but $300.00 a year for a unit is to high. When these units are perfected and built to last it would be a smart purchase , as of now I feel we were victims of pre-planned obsolesce