I am doing short of 5 stars...nice, sturdy product. I chose to pre-cut my 4x4 cedars ahead of time, but as I was putting the workbench frame together, I realized that there would jot be enough of the longer bolts included for 4x4 construction frame option...had to make additional runs to get more hardware. Hardware included is metric, but bought the US standard equivalent of 5/16\" carriage bolts. Refer to pictures, the instructions jist have a drawing but do not seem to indicate to use 2x4 as well?