Amazingly engineered frame,  all wood and very few pieces of metal, the reason I took a star off is because the slat frame has a 1/8" gap that takes away the claim of a perfect piece of engineering, easy to fold, easy to deploy and does not make any noise when laying on it, great work.  It takes a little bit of extra skill to assemble it, and the only tool I needed was a rubber mallet and the regular power tool screw driver for 8 screws.