I purchased an MSS mostly because a sleeping bag and shelter was one part of my gear I've been neglecting for too long and I wanted to get something that is well known and reliable but also inexpensive.

I don't go camping or hiking often enough to justify spending so much money on smaller and lighter gear -- it's what I can afford and it works, so I'll deal with the weight for now.

I have mine set up in a Hellcat style Alice setup (Alice pack and frame with Molle straps, kidney pad and MSS carrier).

Don't forget a good groundpad, and keep in mind the extreme cold end of the rating is for 4 hours sleep and also assumes you're wearing polypro base layer + cap. It's not going to be comfortable but you'll be alive...