Pleasantly surprised! Fit my king adjustable perfect. Took about 2 hours in total start to finish to get it completed. Did not use slats as adjustable has its own legsplatform that fit right in. 
Beautiful white color-slightly softer than a bright white. Matches white trim in room. 
Mattress is very thick with pillow top and adjustable platform legs so no space between headboard and mattress, otherwise you will need a box spring if you don’t want the space.