The most unexpected good thing, among all of the good aspects of the Trinity, is how comfortable it is for me (6'1") as a backpack. I expected a compromise but shouldn't have. At 15 pounds (pack + stuff), I can wear it all day.
I have used my Trinity for roughly three dozen domestic and international trips, for work and non-work trips. I do not use it as my everyday bag. The workmanship, design and materials are excellent. It still looks like new.
When traveling, I carry it either as a backpack or over the handle of a rolling bag.
During travel the contents including my laptop are very accessible--when the Trinity is sitting upright (landscape orientation) on top of a wheeled bag, when it's under the seat in front of me, when it's sitting upright on a desk or table, and when it is in the overhead bin (for instance, for exit rows on international flights when under-seat stowage is not permitted).
Here is what I usually stick in it (I'm probably forgetting a few things): Surface laptop, Kindle, cables, toiletries, change of clothing, one folder of paperwork, raincoat, lightweight down jacket, phone, snacks, one book, wireless ear buds, book light, masks, 16-oz wide-mouth Nalgene water bottle, writing and other implements, notebook.
When filled with everything that I want with me for international flights, it is right at the carry-on weight limit for many international airlines (15-17 pounds). That said, I'm always surprised by how light it is when I pick it up empty.…