The product is ok.  It is beyond me why the manufacturer did NOT pre-drill the holes beneath the (main) desk.  I had to either hire a handyman or to go out an buy a drill to drill the hole - no way the can screw onto the under-side of the side without the drilled hole.  

The instructions are clear, but need a methodological head to understand the different configuration options, so that you build it correctly.  It is not as difficult to understand the instructions as other users have mentioned, but you DO need a drill, which the product description was silent on - important for those of us who do not have a drill at our disposal.