BRASS valve on the 20" wide model. That feature is worth so much alone. Second to holes, I've seen valve failure kill more sleeping pads than anything else, and it's way harder to repair than a simple patch. This means brass is freakin sweet. Best quality for the money.
Not even close to the smallest or lightest. No brass on the wider 2 models. As is common, stuffsack sold seperate. Takes longer to inflate than some, that's typical of solid foam cores compared to the perforated foam cores.