This is a really great product for the price. A solid piece for sure because the thing is 200 pounds. Really.  
It is hard to assemble if you don't have someone else to lift the box. The boards the bed rests on are the heaviest part. That being said...it's probably indestructible, so if you are worried about wear and tear it will probably survive the rowdiest kids.
Next time I will pay better attention to shipping weight!