Despite what other reviews said that I looked at before purchasing, this was not an easy unit to assemble without an extra pair of hands especially when it came to putting the top part on which did not have any rigidity until the back went on.  Sadly, whilst there were pre-drilled holes in the hardboard backing there were no corresponding holes in the cupboard sides to screw them into, and putting pressure on the screws resulted in the unit falling apart and a piece of the backing falling off!  In addition the pre-drilled holes for the top of the bottom section to screw into were not deep enough and the screw did not go in straight and split the wood, which unfortunately was at the front of the unit so is quite visible.  All in all, I have been disappointed in this product but it was purchased as it was only one of a few that would fit in the spare space in my ensuite.