content: After about 2-3 months, I had problems with the extension tube's rotating brush head. The brush stopped rotating, meaning that it now simply gets in the way of airflow. And the main body takes two or three passes to get some very easy, lightweight things up. I also agree: it's bad to leave the thing running in one spot because it will friction damage your carpet, which is a bad flaw. So when you use the (badly designed) extension tube, watch out. Another problem: if you run one side of the main floor unit under a narrow rim, i.e. a cabinet, the main vac belt tends to come off. This cleaner needed more testing and was marketed too quickly.