This dryer was sent to us as a replacement for a GE dryer we had only had for 4 months.  It was delivered last week. This dryer is so good at doing it's job.  It drys clothes great.  The sensor dry dries them perfectly.  However, it has a loud knocking noice that is constant.  The dryer can be heard in our downstairs living room from our upstairs laundry room.  That is my only complaint.  If this is normal for this dryer I could not recommend it as it sounds broken.