I don't have any experience with it but lately they have been running a Marmot never summer down bag on steepandcheap for under $150 I believe. I was on a tight budget when I was looking for a bag and ended up getting a Kelty Cosmic down 20* bag for $72 off steepandcheap. I think it weights 2.5 pounds. I also got a sea to summit reactor liner from an REI scratch and dent sale for $20. With this set up I should be good down to 10 degrees or lower, though I haven't tested it to those temps. I was sweating when it was in the low 40's though. It's likely not of the same quality as the mid tier bags but I think it was worth every penny and have heard a lot of good reviews. If you spend a lot of time in the back country I'd probably just spend the extra cash for a better bag though.