Product review (3 stars): I think this is better for a professional repairman
It's the basic unit for my needs. Many items had to come off the old unit for reuse, plus the new unit basically had to be taken apart, and be reconfigured to accommodate my application.  There were no instructions on how to do what I had to do.  I think this is better for a professional repairman.  Once I got it installed, it performed well.