I had to go find what I said about my tri stool last year in my solo trip report.  I cut and pasted it here.  Read the sentence about comfort.
“Stool
Just got a new stool form Basspro  it weighs 26OZ fits in a bag 15 inches long and 4 inches wide.  It stands 21 inches high.  It is 3 legged and seems very strong.  Out of the bag and set in 10 seconds. It is almost as comfortable as a sharp rock.  It holds a plate nicely”

I really liked it until I was on a trip and sat on it while in camp.  When I move it pokes me in a tender spot.
I have gone back to one like DD has.  It is a little delicate but I have used mine on about 6 trips.  The biggest thing is not to put sideways pressure on it.  The ones with the bar on the bottom of the legs are much stronger and weigh two times as much.