Product review (5 stars): Good idea, cheap brush head
Bought this about 2 years ago, used it and was reasonably impressed, but used it again today and the plastic brush head cracked and got left in the dryer vent. Luckily since it was my birthday, the head came off near the dryer vent hood. It would have been a nightmare if it decided to fail midway through the cleaning.

The company guy called me and admitted that the brush head I had was poorly designed and promptly sent me the new improved brush. With the new brush, I have to give five stars. More remarkable is an honest company trying to do the right thing. Maybe it will grow and buy out Goldman Sachs.