My wife and I travel a lot, and we've been through the usual rotation of heavy-duty duffels. Started as everyone does with one named for an alpine feature, went to thinner ones named for a fossil for the weight savings, and haven't really been satisfied with either. We got this bag for a 3-week trip through Madagascar, and it performed beyond our expectations. Light, burly, keeps its shape well, easily removed shoulder straps for that stressful moment at check-in, handles in the right places, lots of tiedown options. Best of all, NO HUGE LOGOS. The design is chilled out and not a theft target.
If I had to come up with negatives, the hook & loop carry handle link attachment isn't as secure as it could be (a snap would help) and mesh packing cubes do not play nice with the TiZip. But that's it. If you're on the fence, get it and don't look back.