The materials seem to be very good.  There was an extra screw of each type in case of a problem.  It would have been 5 stars but the instructions were SSSOOO terrible.  They don't show all the holes and in what diretion they should be facing when you put some pieces together.  It is a little shorter than I would have liked but that's my fault for not paying mre attention to the dimensions.  Also when I opened the box after it was delivered everything was all over the place in the box.  No paper/foam between pieces just laying every which way.  Because the bookcase is just wood and metal the way it was in the box didn't matter except it was harder to organize the pieces to put together.  It looks nice and seems to be very sturdy.  The drawers hold a lot more than I thought they would.