THE SEATS ARE STURDY BUT PUTTING THE SEAT ON THE FRAME TOOK  A BIT OF DOING. HAD TO UNSCREW AND RESCREW THE SEAT TWICE. IF IT WAS PREDRILLED IT WOULD HAVE BEEN EASIER, THE SCREWS KEPT PUSHING THE SEAT AWAY FROM THE FRAME.
ONE LEG WAS SLIGHTLY OFF IN LENGTH SO I HAD DOUBLED UP ON THE FLOOR PROTECTORS    (I purchased separately) ,PUT ON TO STOP THE CHAIR FROM ROCKING.