Classic Backpack 28L

For 10 days in Taiwan, I used the tomtoc Navigator-T66 Liteway Travel Laptop Backpack 28L. Its design choices (which I won't go into) make it just so damn versatile, practical, and easy to use. I fell in love with it immediately. It has become my favorite budget, personal-item only backpack, better

Of the bags in your list, I don't think the CabinZero Classic Cabin Backpack 28L has as good a shoulder harness as the other bags. The others will be similar and it's just a matter of what fits you most comfortably. As for other bags that can pass as a personal item on Allegiant, the one that comes

I'm waiting to book my flight until my visa comes through, so I'm not sure on the airline yet. I'm looking for the most versatile backpack that meets my needs, so fitting in a Ryanair sizer would be a plus but not a mandatory criteria. I might be leaning towards Cabin Zero Military 28l but it seems