Initially I was a great fan of Command Hooks but that enthusiasm has been tempered by deteriorating performance. In the latest example I carefully cleaned the side of a wooden cabinet with rubbing alcohol, applied the medium-duty hook per the package instructions and dutifully waited over an hour.  After waiting for the adhesive to cure I gently hung a thin cutting board on the hook. In less than 5 seconds the hook and the cutting board were on the floor. The adhesive strip completely gave way and lost contact with the cabinet. I am amazed at how poorly this product performed and would not have believed it if it had not happened right in front of me. Two stars to recognize that Command Hooks used to be reliable.