Product review (5 stars): So far so good. When O had my house built the deer ...
So far so good.  When O had my house built the deer obviously had a better blower in it than the new ones do these days. I never even heard of a dryer booster until I researched why my clothes were not drying.  I tried everything .  Cleaned out the dryer (actually tore it apart so no lint was in it at all). Changed the Thermistor (which actually was bad)  but it still would not dry the cloisters inn less than 2-3 hours.  Then I researched the boosters.  Since my Dryer vent goes under my master bedroom with a few 45 degree turns I figured this may be more than I was to spend  but in the long run it may be worth it.
I had to rig a few parts because my ducting is not metal, so a few modifications later (1 trip to Ace hardware) and I got it working.  It works like a charm.  One go for the dryer and the clothes are now dry.  It turns on and off with the dryer.  My wife (who does most of the laundry in our home), is finally happy, so that means I am happy.  Yeah!