I put this together with my 17yo. I’m 45yo. We put my daughter’s loft bed from another company together prior to this one so we felt pretty cocky putting this one together. It was pretty simple. I will say it’s a little shifty. My son is maybe 130 pounds. He says it rocks a bit when he gets in it and it makes him a little nervous.  I love the look of it. It’s full sized and the desk is very roomy.