Very nice and sturdy.   Took a loooong time to put together (by myself); the directions were entirely adequate, but barely...  Make sure you pay close attention the which side of the metal parts are the *back*; because several steps LATER you discover the cross-braces must haver the holes no the back.   There are also "extra" holes (which I assume are for the "L-shaped" assembly; I did the flat/long shape).  It's also a bit of a struggle to GET the very nice wooden shelves to slide INTO the spaces for them:  take your time, try various approaches, and eventually you get the trick!  VERY nice bookcase!