I'm still struggling with this.
The Tristar is 19" x 13" x 8"
My giant Kirkland roller is 22" x 14" x 9"

So the Tristar is barely any smaller. How does it fit in an overhead easier? On a CRJ? How does it fit under the seat? How do you carry one into a meeting without looking like you're carrying the world's largest computer briefcase? Not seeing one in person, I'm having trouble visualizing this.