I had this unit for a year and finally got around to assembling it - instructions we not at all helpful but it was fairly easy to figure out that the longer bolts attached the legs t the top of the table and the shorter ones were for the shelf.  Had to re-assemble the legs when I missed that there is a cut out slot for the lower ledge and that they all had to face inside to work (turned sideways was a "no-no") but all is well.  The wood is solid and I really like the piece.