Some experience advice: I owned the regular version of this stool and loved it, but a friend used it and I wasn't aware of its weight limits or her weight (and being a Her, it's not something I'd ask) but she snapped one of the seat support bars while sitting on it sewing.
So my advice is, despite almost doubling of the item's weight (~1lb to ~2lb), it may be worth going with the XL instead of the regular just in case you have a solid friend who uses it, or you sit down on it with your camping backpack still on, someone stumblefalls on it while drunk at the campfire, etc.
Once broken, game over.
Glad this drop came about as I'm getting two. It's a great, compact stool you can toss in or tie on the side of your backpack. Would be nice if it had MOLLE straps on the side of the bag for backpack attaching, but I'm kinda nitpicking. Can maybe sew some on myself.