Product review (5 stars): I love that all that heat from my dryer is heating ...
Revised after a month or so of use: I love that all that heat from my dryer is heating my home now!  The lint does partially blow out into your laundry room.  :(  Some gets caught by the water that you put in the bottom of the white cylinder, but some blows out. My solution was to wrap the device with a mesh dryer bag (see photo).  This catches the lint and keeps it from your laundry room.  Every load, just twist the bag so that the lint in front of the exhaust holes no longer matches up to and blocks the holes.  When the bag (after a bunch of loads) has too much lint in it, take it off and clean off the lint.  Also add more water to the basin at that time.  My only other pause in recommendation is something I failed to consider when I ordered.  At some point in the late spring, I'll have to reattach the hose to my outside vent, as I don't want warm air going into the house in the summer!  Wish there were some kind of flip switch/diverter that could do this.