Product review (5 stars): pretty good
This works very well.  I've had it for over a year, through a 100 degree F summer, and a 20 degree F winter.  The only issue I've had is that the dryer hose has fallen off the quick connect piece a handful of times.  When it does, I wrap some medical tape on the quick connect piece for a better fit (I used the included foam tape on the end that connects to the dryer).  I think for this purpose, the cloth back of the medical tape is better than the slicker back of duct tape.  I suppose I could also support the dryer hose with some kind of hanger, but the tape has worked fine.  The flange to connect the hose to the dryer is great.  It's super easy to use and has held on tight.