I am a weekend and week long section hiker. My total 3 season pack weight including 5 days food and 2 liters of water is 29 to 30 lbs and with several gear upgrades I should be down to 25.
Current sleeping bag, a cheap 35 deg synthetic 2 lb that is uncomfortably cold below 45 deg for me. I want to be WARM! Coldest I expect to be out 30 deg.

I am looking at a ZPacks 20 deg sleeping bag, regular/long (900 fill down) http://www.zpacks.com/quilts/sleepingbag.shtml. At about $400 and 18 oz. it looks like a good deal.

What are your thoughts? Is this bag as good as advertised?