Awesome bed. Kids love it. Sturdy if installed and all the screws are tightened properly. We got an installer to put it together. He slaved over it for 4 hours and didnt do a good job in the end, but beats putting it together ourselves I guess. Husband went in afterwards and tightened all the screws. The only important improvement suggestion on this bed would be that the beams supporting the mattresses should be solid and not flimsy plywood. We are planning to add planks to provide better support. Other than that, everything is ok. 
Advice get installer. You will curse yourself if you dont.