This is a grand piece. Took about 30-40 mins to put together with 2 people. It fits around our cal king adjustable base, we just had to remove the metal plates that were attached to the base and it fit perfectly.  I was a little hesitant because the dimensions that were provided on Wayfair were not what standard Cal king measurements are, I think they flipped their width and depth but took the chance and it fit. We love it so far.