I usually one-bag it. However if I need to check luggage (like if I'm taking a few bottles of Johnnie Walker Black to my team in India, then I'll take the Pelican 1510. I will stuff extra clothes in the bag to keep the fragile stuff safe. I also bought it previous to becoming a one bagger after seeing my gate-checked carryons soaking in the rain/snowstorms. With the Pelican case such occurrences are a non-issue... not to mention the 1510 makes a good seat in a full gate area.