Unbelievable quality for the price.  The key to assembly is not to tighten the screws as you attach each shelf; give yourself some wiggle room to get the shelf in alignment.  But once in place, tighten the screws works just fine.  Love the entire piece and the half circle shape adds such visual interest to the table.  Nice job Wayfair for providing this awesome piece as a selection.  BTW I have other pieces of this manufacturer...all are awesome quality and design for the price.  Wayfair makes my house look so good.