Just received this loft bed and it is so easy to assemble that my 15 and 16 year old sons put it together themselves in about an hour. The only reason for the 4 stars is that is could be improved with these changes to design: ladder is narrow and hard to climb and also uncomfortable on your feet (I'm looking into rubber grippers to wrap around the rungs); there's no opening at the top of the ladder so you have to climb over the side to get in/out which is a bit challenging; metal rails are uncomfortable if you sleep against them (so I am going to sew a bumper to provide padding).  But we still are very happy with the bed in general and I'm glad we bought it. Arrived SUPER FAST.