I'm planning a long trip across Russia and China and am looking for a single bag that will suit me. I will be spending very little time flying, and a fair amount of time on trains. When I'm not a trains, I plan to stick my main bag in lockers (or leave it in a hotel room) whenever possible and only walk around with a small messenger bag (which I'll store inside my main bag when I have them both). However, I'm sure I'll be stuck carrying my main bag on my back for at least several hours on many days (I still won't be hiking up mountains with it).
I was recently introduced to the idea of convertible carry on bags and kind of like the idea -- they maximize carry on room, are more easily stored on planes and transportation, and may make organization easier.
However, do those here think that the Aeronaut will be appropriate for what I want? Will it be comfortable enough for the times I'm stuck carrying it, or should I consider a more regular backpack?