What Zoe just said.
My favorites are the folks with backpacks or shoulder bags who stand beside me in crowded situations, then turn and whack me, or wear their bags/packs inside the plane and then struggle getting them off and into the overhead bins. Fellow passengers beware!
Similarly there are the people with roller bags who have the handle fully extended so that the (usually black) bag is almost laying flat on the floor and sticking out a good 3 feet behind them. I can't control their behavior, but I can at least be aware and try to avoid them. Defensive transportation hub walking and airplane loading?
But full disclosure here. Although I prefer spinners and have defended them many times, I decided yesterday to try an Eagle Creek Load Warrior 20" Wheeled Duffel with 2 wheels. It was on sale (as the first responder to bodo's post said) and the Eagle Creek website had the lowest price I could find online. Of course I got a Cactus Green one. I love the color, and I hope it will be bright enough for other people to see it.
I checked Frank's website for a review, but I think it's too old for that. It is about a pound lighter than the spinner I have and has a smaller capacity, both of which were features I wanted. The link above includes packing advice and a video about the bags in this line.
I will be flying British Airways, RT Seattle-London. Their baggage allowance is 22x18x10. Even extended (20x14x10) falls well within those limits. My intention is to not extend it. The 20" height includes the wheels.
I will test pack it when it gets here and give it a trial run on a driving trip in January. I've found it comforting that so many people have more than one bag they use depending on the trip application. I also find it comforting that any bag mistakes I make are easily passed on to the kids and grand-kids!