Product review (5 stars): Easy to clean, easy to install, and easy to make a LOT of humidity in your house, quickly!
Great vent.  I'm a humidity connoisseur and the house was at 15% constantly.  After adding this and doing a few loads of laundry, the whole house was at 50% for quite a while.  I realize now that the screen comes right off so you can vac any lint out - easy to clean.  Happy with this product.