I recently got this bed for my boys shared bedroom. They are 12 & 6. We all LOVE this set. It took me about 3 hours to assemble (most of it by my self) including putting on mattresses & bedding. 
One thing to be aware of - it does not come with bunkie boards, so if you are using foam mattresses (rather than spring) you need to purchase bunkie boards separately. The stabilizer rails are metal rods. My 12 YO wanted a foam mattress, which is really nice, but he says he can feel the rods underneath. So I’ll be ordering a board to go on his part of the set.