I've only ever had children under 12 sleep on it. I would imagine it might be short for someone that tall. It's very thin but if you aren't Pooh sized I'd imagine it would work at least okay....
My son is 6”6 and 230 lbs. He likes the sleeper chairs at Kidani and OKW. He will use an air mattress before using the the sofa beds. Those aren’t that comfortable.