I assembled this alone and had no trouble.  The arms didn't seem to line up properly with the predrilled holes, but I set the bench on the front, resting on the front of the seat and the ends of the arms and used its own weight to get the holes to line up.  The one thing that is a little odd is that the material is cut away in places to add a decorative element, but it changes the texture of the material.  There is a woodgrain pattern pressed onto the surface, the the cut away surfaces are smooth and show some of the recycled material.  Not the end of the world...