Perks
Mountain Hardware innovated a Quantum Expander in their Switch line of sleeping bags, allowing the user to expand the girth of the bag by 8 inches. Also the Switch synthetic Thermic MX lining offers ample padding when sleeping without a pad, and you can compress it to 8 inches by 16 inches, which easily should fit into your backpack.
Sacrifices
Due to the Switch sleeping bag's design as a compressed backpacking bag, it fails to keep you warm in very cold temperatures at high elevations. Also it is heavy compared to competitors' sleeping bags recommended for similar use, such as The North Face Orion and Marmot Helium.
Bottom Line
The Mountain Hardware Switch sleeping bag has sleek size and warmth. At prices ranging from $115 to $160, as of 2009, it is a great value for any backpacker. But for campers where size and weight don't matter, they might want to consider a warmer bag at a cheaper price.