I'm tall, so 2 wheel. Adds 2" of packing space. Doesn't roll away from you when stopped. Plus I do mixed surfaces alot - like brau with cobblestones in EU. Spinner suck in that, you then tilt them and the little wheels struggle and thunk worse. Others in my family (ladies, smaller) like spinners but they are basically going to resort like places most of time. And spinners already take up 2 wide position, and with another 3 wide, there are few airports now have space for 3 things/people side by side. So its a matter of choice (to me, size matters) but I am not a spinner fan. >2M miles on United, and 1.5 on AA. so experienced traveller. FWIW