>>685002 I own a hunters edition. Use it mostly for sleeping in on summer nights and as a bivi/extra warmth rest of year. It's also decently useful for sitting still and light movement e.g. when in camp or small walks. Wouldn't recommend for an entire day of walking/hiking.
I never used with a pack bigger than 30 litres. a larger pack would start to be troublesome around the 40-50 liter mark.
Ask me anything but be warned, I'm going to bed now but will answer tomorrow/later today.