I agree with your beef and will add mine: In the last month, I have returned at least four online purchases of what calls itself "UNDERSEAT wheeled carry-on luggage." Each piece has failed to fit under 4 mainline carrier flights (NOT regional jets) I have flown lately. GRRRR! BACK to the seller each and every one went...

Because of back problems, I can no longer haul around my carry-on backpack, and because I am short (with back problems), I can't lift a bag into the overhead. All I want is a wheeled SMALL carry-on that DOES fit "under the seat."