I use the Aeronaut for this, too
I still usually take an Aeronaut, even on the occasions when I think I'll check a bag. The reason is that even when I'm not carrying this luggage around in airports (during stopovers) and on planes, I'm still going to be carrying it around the rest of the time, and it's just easier to manage. I've checked the Aeronaut when I've traveled with family members (who are checking bags), when heightened security made it seem preferable to reduce the screening time for everyone going through airports (just after the Heath Row incident, for example), and when I've had really long layovers where I didn't feel like toting bags all that time.
Originally Posted by pretzelb
The Aeronaut checked has done surprisingly well with "fragile" items -- in the first month of use I found out that the snap design allowed me to expand the central compartment to include books, a small tea set, and a piece of glass artwork that were acquired/given by relatives along with the clothes I had originally packed for the outbound trip. Just my experience. YMMV. Of course, if you're coming back with even more stuff, you might need a larger bag.