Final thought - bag under seat has hugely improved my plane travel
I've used my Tri Star for a good few flights on various short haul flights, and the one 'feature' that I love, above all others, is the ability to place this bag under the seat.
As I'm sure it is in the States, short haul EU flights are packed to the gills with people's max-sized (usually had sided) cabin bags.
This causes several problems; waiting till last to get on the (unallocated seating) plane, risks having to stuff a bag in a locker several seats behind you and the resultant battle through the aisle on landing, or worse, getting your bag checked because the overheads are full (see this happen several times).
The Tri-Star is *perfectly* sized to slip under every seat I've sat in so far (Airbus 320s, smaller regional jets, etc).
This may seem like a small 'feature', and yet it has made a huge improvement to my flying experience; less stress, more time - now I can board when I like, and not have to fight for space in the overhead bins.
Having the Tri-Star in black is probably a help here - less visible under a seat to any over-zealous cabin staff.