Product review (4 stars): Don't Put Water In It!
I don't really see the purpose of this indoor vent.  I have a great little Avanti dryer that doesn't put any lint out of the vent though, so if you have a dryer that does, perhaps it will be a better fit for you.  I filled the bottom half full of water as the instructions directed and it turned my apartment into a wet sauna, it was awful.  Now I don't put any water in it and it works just fine, no more steam bath and difficulty breathing.  There is never any lint in it though after using the dryer, but I really think it's because I have such a well made dryer. I also let
my clothes dry until just damp on a clothes rack I purchased from Amazon.  Takes no time to dry
and I haven't noticed an increase in my electric bill.