You buy this pad because your <5' tall, or your looking to shave ounces. This actually weighs in at Just 10.75 oz without the stuff sack or cords (rubber bands work just as well).
I got this pad because it has the same specs as the prolite short, but a lot cheaper. For being only 1" thick it's pretty comfortable as long as you choose a rock free campsite. I can sleep anywhere on my big Agnes insulated air core, but this is half the weight so it's well worth it.
Like other reviews of this and the regular sized version say it takes a while to inflate the first few times but slowly gets quicker. It doesnt puff up as fully as a thermarest, but I think that actually makes it more comfortable (you can always put a few breaths in there if you want).