The quality of the door is great and 4.5 stars! However this door is way toooo heavy to anchor into dry way and must be supported by at least 3 studs (both ends and middle). The holes on the rail do not align with the standard stud range in a wall in any way (at either 16”) and therefore it will require a wood panel backing to support the heaviness of the door and frequently sliding up and down the rail. It is likely that the door and rail will pull right out of the drywall if not supported with wood backing or at least supported studs. This recommendation should have been included in the assembly guide.