I am thinking of buying the luggage as a carry-on.
I am sure the luggage is just fine on AA as a carry-on but I am not sure
if it is same for when I travel in Europe,especially on BA and LH.

Anyone had issues with this luggage when travelling in Europe?
I think the luggage will fits for overhead bins of most of typical airplane such as A319 ,320 etc.

I am a liitle worried about security check point at airports(especially at LHR) as it may look a little bigger.