Instructions left a lot to be desired, some of the 'cartoons' were difficult to understand, one piece was incorrectly numbered, instructions for fitting the sliders to the shelf were very difficult, no markings were on the shelf at all as to where the screws should go, each side 3 screws but a choice of about 6 or 7 holes?????. and no information about the positioning.  Instructions for positioning the castors was very confusing and unclear.  Construction in 1/2 hour was somewhat ambitious.