Lovely bench that adds a great deal to our yard.  That said, although assembly was somewhat intuitive, the instructions where confusing and the actual assembly mechanism detracted from an otherwise excellent bench.  Either the existing screws should have been countersunk into the metal frame so that they were flush with the frame or the screws should have been replaced with machine bolts.   The heads of the machine bolts would sit flush to the metal frame and stick out, but would appear as a natural construction feature.  Also, it appears that one of the screw receptacles may not have been drilled deeply enough, thus causing an improper fit one one side of the back assembly.