The seats are unbearable for regular folks, I can't image what it must be like for the heavy set. Especially on Delta, American. Some of the planes have the stupid function where the seat bottom moves forward if you recline, basically giving you no leg room anymore if you want to stretch your legs under the seats in front of you. You already get zero room anyways with seat upright, why would you have that function?? Also most of the seat bottoms are way too lengthy, we need a small seat bottom so you have as much room for your legs to move. It's like they cater to people that are 5 feet and do not care about the taller folks, when it should be the other way around.