Black Diamond Couloir
Price Paid: $42
I guess it depends on what you're using it for. If you want something to keep you comfortable while hanging around in the rock climbing gym, this is really too light for regular use.
While I do a bit of that, the main reason I bought the Couloir is for glacier travel, and for fall rescue and recovery in an emergency. As a hiking guide in the Rockies, there is sometimes a chance that someone will slip or fall, and I need to carry a kit, including a rope and harness.
Because this one is so light and compact, I can actually carry it without it being too much of a nuisance. Packs down to about the size of a pop can.