Well, I do not believe my backpack would have fit with ink the guidelines. However, that being said, given a cursory visual inspection, it would be similar in overall profile to that of a medium size wheeled carry-on that had its handle extended and personal item attached to the extended handle. So, I guess I should feel a little guilty while it night technically fit the dimension guidelines, it does not fit like the intended items. With regard to my comment about the pax, you are correct, in hindsight it was an irrelevant comment on my part and had no bearing on the subject matter in the first place. Thanks for your thoughts.