I am a bit late posting this but I meant to come back and tell everyone how well I did with a Tri-star. My husband and I did great with the Aeronaut (45) in Europe but before the price increase, I grabbed a Tri-star just in case.
I had 2 months ago to Portland, Oregon and I decided to take the Tri-Star and my Synapse 25 with me. The Synapse 25 was under packed (really just used as my day bag in Portland, carry my laptop) and my Tri-star was packed pretty decently on the way out. I was surprised with the help of packing cube and the packing cube backpack how well it did. My trip was a week long and trust me on previous week long trips, I was packing a bag that had to be checked due to size. So I was a bit worried about taking a bag as small as the Tri-star. On my return trip, I had bought a few items and everything fit in between the Tri-star and my Synapse 25. And no checked bags either way!
The best part was on my return trip, I had a connecting flight and my plane was getting delayed, delayed, delayed (it eventually got cancelled). Once I hit a certain delay point, I saw another flight leaving, called the airline while waiting in line, told them I had no checked bags and asked for a seat on the plane. They got me a seat and I got home that night. While many others were stuck in the connecting city or may have left the connecting city, who knows when their luggage got there.
So thumbs up to the Tri-Star :)