I was VERY surprised by how sturdy this shelf is and how simple it was to put together. Seems to be very good quality and holds a lot without sagging. Instructions were a bit confusing (stating to install the slide rails on the door panel) but the installation diagram made this project incredibly easy! I poked small holes in the diagram where it shows that the screws go, lined the diagram inside the cabinet and taped it down, then colored the holes I made in the diagram with a marker, drilled the holes, laid down the slide rails and the screws lined up perfectly! Total installation was very quick