Product review (4 stars): TWorks great but what no one has mentioned is that the ...
TWorks great but what no one has mentioned is that the head should come permanently attached.  Everyone mentions to tape the sections together but the head came off when I change rotation direction one story up in my dryer vent.  Had to get my father in law to come over to get on the roof and push the remaining head (we ordered two because we needed more length) down to push out the one that got away.  Vent is clean now though and clothes are drying quicker!