If ZERO were possible.  Assembly of this product is significantly difficult.  I know my way around tools and instructions and have put together a lot of stuff with less directions.  I'm sure it'll be fine when/if it ever gets done.  FIRST - 1 of the most critical pieces of "hardware" are flimsey brackets made of plastic, that can easily break 1/4 turn more than needed - those break and you have no front doors and need to go buy more hardware to jimmy it together.  SECOND - the most critical function of a filing cabinet is putting the drawers on - there are ZERO instructions as to how the bracket on the drawers are to meet up with drawer arms.  ZERO.  If you buy this, pay for installation.