We carry just about every stool available, but the sturdy design of this stool -- the heavy canvas and quality frame is terrific for the price. Don't raise the price. It's a top seller because it's well made and affordable. It's quite portable as well. Good, solid outdoor product.
This stool is teriffic. Its fairly thick aluminum tubing frame is stong (handles my 280 lbs.), lightweight, and doesn't rust. The design of the legs create more surface area in contact with the ground. So the the legs don't sink into soft ground as readily as other designs. It folds and unfolds easily, is pretty compact and can easily be packed into a canoe, put in or lashed to a pack for a portage. I have both the 4576 and the 4578 with backrest. They both comfortable.
I would really like to see a portable commode made with the same materials and leg design as this stool (based on a frame simular to the 4576). Texsport makes a commode with a thin tubular frame/legs with the ends of the tubing in contact with the ground. That design is not as strong and does sink into soft ground. You wind up struggling not tip over while your communing with nature. That's no fun, and I especially don't like having to squat over cat holes.