Product review (5 stars): Saved me from buying a new dryer
My dryer stopped heating, so I decided to give this a shot before buying a new dryer.  It was a massive pain to install since you have to basically take the entire dryer apart, but totally worth the 2 hours and $15 to save $500 buying a new one.  I also discovered that lint had built up badly which is definitely what caused the issue in the first place.  I moved the dryer and shortened the tube so it wouldn't happen again.

Also, make sure to google your dryer model number so you can see the youtube video on how to take apart the dryer.