Well NOT HAPPY, at 1st, as the website changed after I ordered.  The design is totally odd for the King and the Cal. King get 4 board sections that add up to 86" which is WAY wider than a King, and thus a Cali too.  I have a Cali. King, 72" wide, therefore only 3 would fit, but short for what I needed!!!  Oddly 2 on their side were precisely the dimensions that I needed.  So I took the metal hangers off the back(s) which were not to my liking anyway, too flimsy for a headboard. Turned the headboard pieces on their sides and screwed them into the studs with 3" black wood screws. All finished and happy!  The bottom bed frame is actually a 23-year-old waterbed frame with 6 drawers underneath which has a special mattress now to replace the water mattress.