I haven't been challenged at the gate so I don't know if it fits in the shame box. But it does fit wheels first into the overhead of a small 2x2 plane. The padded side handles are very helpful for lifting it up. The wheels work great on smooth airport floors and I like that the handle can lock at different heights.

I'm dinging it a star because it is lacking in interior organization. I have another Travelpro carry-on with 2 wheels that has a really nice garment folder integrated into it. This one just has a zippered area. I still choose this one even though the 2 wheeled one has the garment folder and more interior space. It's just so much easier to get through the airport with a 4 wheeled spinner.