We purchased this for a bunk room and it will be used mainly for children.  The kit isn't too difficult to put together and it is very sturdy once you have it up.  However, don't expect to be holding two adults on the top bunk.  It isn't designed for that.  I believe the weight limit for the beds is 250 pounds, so four adults trying to squeeze onto this bed probably wouldn't be safe.  It works great for our purposes.  Once we received the item, one of the railing bars was slightly bent.  We took pictures and contacted Wayfair asking what they could do - they sent us a new railing and gave us a small credit - much more than we asked for.  That is also why I continue to buy from them!  

Pros: great price
Cons: no issues