In reply to UKC Gear:
Good round up and comprehensive review although I always want to know about bag shape as I reckon it makes a huge difference to the performance.
I've found that ME and PHD bags tend to be slimmer cut and for me makes them much warmer as I'm closer to the insulation. Ajungilak and MHW seem to be cut for folk the size of bears and hence(for me)colder but does however mean that I can use them as outer layer bags when doubling up.