I have back and hip problems from time to time. I bought and used 2 leg round bar stools, 2 kinds of 3 leg type chairs, 4 leg stool, Stadium seat type, Hunting pads and Hot Seats. Along with Mono pods, shooting sticks and Bipods of various heights to accommodate my height while using them. They are all good and they all suck.
Sitting on a pad is nice, but you need back support, in powder snow its bad, and try getting up after 30mins, Plus the height for seeing in rolling farm country sucks, especially at night.
Chairs and stools on uneven ground with or without snow is a real joy, plus the added weight/ noise.
Standing seems to be the best for night time hunting but after a long day of work and or walking into stands back and legs sore, so I end up kneeling which is the best of both, until my legs fall asleep. Which is always a good site to see when I try getting up.
Just like Mono pods, Shooting Sticks, Bipods and Tripods and tripods with shooting plat forum.. Try carrying adjustable Tripods walking in at night and you spot eyes, You think you have time to set it up.
Besides I always like standing near the pool table.