Very sturdy and heavy shelf.  I'm a woman in my fabulous 50's and I put this together myself!  Took some time- but I just went slow.  Make sure that the holes on the black poles are in the back of the unit- instructions don't specify that.  Love the thickness of the top bottom and shelves.  I live at the Beach- and this wood definitely has a beachy, worn in look.  I'm trying to find somewhere else in my home to add another one!  The one I bought is 58" wide which fit beautifully.  Very tall and the price was great!