Product review (2 stars): This is a great product, UNLESS ....
This is a great product that is made well, seems like it would work great, unless your dryer vent is 3 inches lower than the wall vent.  I of of course didn't find this out until after I'd cut the wall vent flush and made it impossible to put the old flex tube back.  If your Dryer vent and wall vent are not lined up pretty close it is almost impossible to connect the magnets, I'm pretty sure that it's going to leak dryer lint all over and there is a big bend in the flex pipe, which is the reason I wanted this product in the first place.  Sure wish I'd thought this out more and went with another product.  If your wall and dryer line up though I think this would be awesome, otherwise look elsewhere.