Product review (4 stars): Saved some construction costs
We bought a house that had a garage conversion - leaving the utility room about 8-10 away from an outside wall.  We didn't want to vent directly to the attic (fire hazard) so that left us with having to route the vent line through an inner wall, a brick wall with about eight feet between them in a closet. This product has seemed to solve our problem, at least for now.  Installation was very easy, although one of the plastic vent lock clamps was defective.  The only other downsided so far is that the instructions call for replacing the water after every dryer load.