Product review (5 stars): Works like a charm
This was exactly what we needed!  Our dryer is in the middle of the house, on the second floor and the vent comes out the side of the house.  We went in from both sides and were shocked at all of the lint we got out!  (Well, not shocked, as we hadn't cleaned it out in 10 years...maybe relieved is a better word!)  It works exactly as promised, we had no issues.  We did use electrical tape on the connections as a precaution, since we had so much vent length and used all of the connectors.  Worked like a charm!