I recently had the pleasure (or displeasure to be more accurate) of flying the 757 transatlantic on Continental. For those of you that don't know, this is a relatively small single aisle aircraft. For domestic flights, it's not a problem - but transatlantic flights see people lining up way down the aisle for the restroom, cramped conditions (couldn't even open my laptop there was so little room) and a general feeling of not enough room on too long of a flight.
I would definitely fly a larger plane w/ a connection next time.