I purchased a Roomba E5 robot vacuum cleaner. The product is advertised as suitable for vacuuming dog hair. This item clogged with dog hair to the extent that no dirt would pass into the dust box. I contacted Tradeinn and they refused to replace/refund. I continued to use it by frequently removing the hair but the fine dust still did not pass into the dust box. After only using the item for less than ten occasions, it will not move. It said the words ` quoting error 11'. However, those words did not occur when I videoed the fault. Error 11 is low vacuum at the dust box. It is now clear that the reason that the robot did not cope with dog hair is that it was supplied with a fault which affected the strength of the vacuum that the robot was creating. That impacted upon its ability to cope with dog hair. I reported the new information to Tradeinn and they state that this scenario still does not qualify for the item to be returned as faulty. I do not believe that this is fair trading.