definitely not a sturdy bed. it is very heavy and a PITA to put together. I  purchased 2 of these beds for my preteen daughters.  it should work for them but i imagine it would not safely hold much more than 100 pounds. both beds arrived VERY knicked up (the included touch up marker should have been a warning) 
the beds arrived much more quickly than anticipated which was 1 good thing. 
most of the bed was fairly easy to put together but once you get to the actual platform part it is very important to make sure every hole is lined up perfectly.  if one is off even slightly you will need to start over.