OK so well made product overall. Some observations: Cam locks need to be able to tighten further and not stop after turning. Cam locks need to be heavier duty.  Sharing dowels between fixed middle shelves is not very sturdy and a cam lock there would make the product much more stable.  
The fact that the unit has to have full floor space laying down very close to where it is to be eventually placed  should be strongly noted on web site purchase description. Some additional right angle brackets could be included rather than relying only  on taped plywood back to stabilize unit.  Any movement of unit before fully screwing in back panel is very dangerous.