I need a cold weather sleeping bag, looking at a 20 degree bag. A system would be better. Dislike the idea of Down. Before its mentioned, i cannot fit inside a regular MSS system. I tried the system at a surplus store and no go I don't know anything about Wiggy's, but they seem highly regarded here. Snugpak is bomber and is comfy feel, and cheapest. Kelty is Kelty, and i had an old Kelty bag when i was younger, but it is lost to time. The Wiggy's seems really awesome with the FTRSS double bag setup. Its like the MSS, but i fit in it! I know temp ratings are a little off, but what about warmth reports near the temp ratings? Zippers? Dealing with moisture? Make me want a sleeping bag.