I bought the "double size" and used the higher setting [there is an option to use a lower platform -- maybe 2" lower].  It was easy to put together [did so by myself] but the two cross rods closest to the middle were impossible to fit in correctly.  I do not believe there is any loss of integrity with inability to secure the rods in place with the piece of plastic.  Bought a 10" mattress & it looks good so far.   Still deciding on bedding.