I like the design and think it would have some very practical applications, beyond a sleeping bag- particularly glassing in cool to cold weather
Weight is a little high for a 30 degree bag, but with that weight comes quite a few features a bag doesn't have.
Personally I'd prefer a synthetic bag in Apex Climashield over Primaloft, the Primaloft is slightly warmer/weight than Apex, but short staple fibers don't have a good track record for longevity- continuous fibers like Apex, do.
Agreed on Apex! This thing will probably have significant loft degradation after a couple week long trips.
My biggest struggle with cold weather glassing is keeping feet warm. I think this thing might help with that.
In regards to weight/warmth, for a true 27 degree comfort rating in synthetic it would be pretty competitive. Honestly it seems impossibly light for that rating with the additional zippers and 20d fabric. The catch is it seems that the rating might be based upon using additional layers which is misleading.