Product review (3 stars): I enjoy bringing in the moisture and the heat
I enjoy bringing in the moisture and the heat.
The 'challenges' are very real ...
  attaching to both ends of the venting cannels.
  opening & closing are problematic. I finally used some screws and thin wire to keep the door open or closed.
  securing it firmly to 'something/anything' was not easy.
  some 'double lint collection' system is needed. It does vent very fine particles into the air.
For the money it is worth the value to gaining the heat & moisture.
No product seems to have come up with ways to deal with my difficulties with the system.