Product review (4 stars): Works fine with a minor adjustment.
When our apartment dryer continuously failed to dry our clothes in a timely fashion I found that the hefty length of routing hose to the roof vent was the culprit.  I had inhibitions about using an indoor vent system due to health concerns with particulate.  Humidity is a factor if you are venting it close to walls, in a small room, or a room that already has a humidity problem (I do not have this problem).  As for the particulate, I took a woman's nylon and draped it over the ventilated portion, cut in the center to allow attachment of the duct, it still circulates the air and humidity fine but without the particulate.  I do not use the mount, I have it placed on the ground, it does not heat up anywhere near being hot enough to concern with fire as I am sure so many are thinking and honestly the ventilation system is much cooler and cleaner with the shorter length of hose and easily removed lint trap  (My ceiling vented duct was horribly dirty on the inside and was constantly HOT to the touch).  The zip ties work fine but I will agree that the top does not fit well with the bottom portion without some tinkering.  All around this is a cheap fix for your ventilation problems so you get what you pay for but I think it works great with just a small modification using a $2 of stockings.  As for the problems with water and buildup or the surface of the water rejecting large particles, fill it 1/3 to 1/2 full of water, not full and I cut it with about a 50/50 white vinegar which for the most part stops microbial growth.  If you change the water out, wipe out the nylon with your hand like you would your primary filter, easy enough.