Very sturdy.  Took about 45 minutes to put together by myself.  All tools came in the box.  There was a slight bend preventing one of the side rails from sliding over the leg fixture but a hammer made that all better.  The only down is that I bought this style frame without the middle legs to prevent toe stubs (based on another users review), but I still banged mine a couple of times on the end legs.  I may have to wrap them to prevent injuries.  Overall, a good purchase.