Product review (5 stars): This thing works great for us
This thing works great for us.  We have a new Bravos dryer with sensors that indicate whether you're getting enough air for ventilation when using it.  Unfortunately, our vent has a wicked angle (they used PVC pipe for venting with a run of about 25 ft.) and we were cleaning the thing every couple of weeks.  What a pain.  We installed this in the laundry room and no problem with venting.