Product review (4 stars): Easy to install
Arrived on time and worked as designed.  Easy to install.  The only suggestion I would have for the manufacturer is they include a half moon locking key that attaches to the shaft.  My old one had this key but the new one did not and it came loose after about a week using the clamp provided.  I went back in to the dryer, readjusted the fan, went to local hardware store and bought the key (about 99 cents) and have had no issues since.