Product review (5 stars): Worked as Promised
I needed a way to create additional space in my compact laindry room and at the same time improve the air flow from my dryer vent, which was being obstructed by the  compression of the accordian vent hose.

I checked out the offerings at the local big box home improvement center and wasn't able to find a sheet metal vent that telescoped to the length I needed.  The units that were on display were unboxed, dented and in one case, a seam was torn open.

The Builder's Best product was shipped promptly, arrived in good condition, and adjusted as needed for my installation.

Before doing the final installation, I used foil tape to seal all of the seams and close a few small air gaps to make the vent almost completely air tight.

The product was a few dollars more than other offerings, but I think the difference was worth it because of the quality.