I am 6'½" and about 270lbs. I barely fit and my hair touched the headliner sometimes. I am comfortable, and if I lose some more weight I would be better off. If anyone is heavier, or taller than me, I doubt they could drive in comfort if at all. I don't want to sit lower, just get my head out of the dome of the roof. I have had people ask me "How tall are you?" thinking I am very tall when they see me in it. I wish the drivers seat was as low as the passenger seat, then I would be better off. But I am alright as it is, and if I needed another ½" or more I would do this without doubt.