I was able to assemble this by myself with no issues at all.  Once it was completed, it definitely seems very stable and sturdy enough for a hybrid queen mattress.  The foot area has the rounded legs and the head feet have 3 slots to be able to mount a headboard.  The 14” height is to the top of the frame, which allows for a nice bedskirt to be added.  Overall, extremely happy with the construction and material that is used.