Product review (3 stars): Lint Screen could be a little better
The device does what it says, it keeps the warm moist air in the house when wanted.  The only problem is that lint filter is not that fine.  We took off the supplied lint filter and attached a cut off leg from a pair of pantyhose to the vent with a rubber band.  This works much better than the supplied lint trap as the pantyhose have a finer mesh and do not have to be cleaned as often.