Terrible instructions. Multiple reviews mention this, consider putting an instructional video to support assembly or updating directions. I bought 2 6inch mattresses and both arent wide enough, leaving the support clips used to secure bars exposed to scratch anyone getting off or on. They pop off constantly. They look very odd. I bought a medium and firm mattress. The firm is comfortable but the softer one leaves you feeling every bar like a cheap futon. Get a firm mattress for top and bottom if you decide to ignore the reviews and buy this. The bars are bent after my very light guest slept on it. Overall I am not happy with the product and the accommodations I must now consider to make it functional.