Product review (5 stars): A lintless laundry room at last!
I have an 18 foot dryer vent that goes underneath my slab  and in the 15 years I've owned my house, I could never get my dryer to dry clothes  while connected to the vent (the neighbors with a similar house have the same problem) and have had to just let the dryer vent into the laundry room and garage.  This made a mess.  After connecting my dryer to this (and connecting the fan to our duct) my clothes were able to dry without blowing lint into the laundry room.