It took me about an hour to put together.  There’s A LOT of screws!  When finished, it was very sturdy.  It is a little smaller than I expected but it’s very nice.  I think this would be perfect for a teenager.  A couple areas called for dowels when it was pre drilled for screws and one shelf had the long drilled out area for the backing to slide into, on both edges, so when it was completed, one line was visible on shelf.  I’ll just paint it black and you won’t be able to see it.  See picture.