I generally will spend a few hours on a summit. So, I want to be somewhat comfortable while there. I tried some different alternates beyond a simple ground sheet. I tried a stadium seat similar to the 'original chair' and some different kinds of cushioned pads, but none packed very tight and none were very comfortable for very long. I finally spent some money and bought this chair. It was expensive, but it was highly rated by backpackers.
It weighs 1lb 10oz, and packs into a fairly small tote that fits into my backpack with no problem. It is a quick setup and knockdown. It is a low chair, which keeps the weight and packed size down. But, it does take a little effort to get in and out of it. And, because of the pointy legs, it will sink down into soft earth, making it much lower at times. However, it is quite strong, and it has not suffered any damage from sinking into the earth, even when all of the legs do not sink in to the same depth.
The weight and size of everything that you carry has to be considered and trade offs need to be made. So, I'm sure that this is not suitable for everyone. But, it suits me quite well.
Jody - K3JZD