Flew today BE from JFK to LAX, my Travel Pro is the same size that many flight attendants use , the 24" , just outside the limit, it always fits with no issue in the overhead, today I did not see them checking anyone's carry on for size in the box.

I hate bags that don't fit as they try to jam them into the overhead, but if the bag fits with no trouble it should be allowed.

Just my 2 cents