This is a great product but I knocked off a star for the difficulty in putting it together and the lack of complete instructions.  Unlike similar products that come mostly assembled, this required even the motor parts to be assembled and connected to the bed.  The instructions were totally inadequate.  Fortunately, I had the assistance of two tech-types in the assembly process.  Now that it is assembled and a new Piedmont mattress is on top, my 95 year old mother LOVES it.