The 757's are very capable overseas aircraft. I'm been flying them for awhile over the North Atlantic. Comfort isn't an issue more than any other aircraft. Coach is coach no matter what plane you are on. The only comfortable long distance flight is in first class. I did 9+ hour flights in the 757-200. I think we are pushing them a little too far. The winglets added a little range too. Weight is not a problem. They are 180 minute ETOPS full or empty. I've never been weight restricted. I've flown them from Newark to Berlin, Barcelona, Stockholm, Lima, etc. Flying "to" is easy, it's coming back that is the problem due to winds. I have never diverted for fuel yet, but it does happen (Newark!). CAL doesn't use the 757-300 overseas. It likes them on the high-capacity routes to Florida,Vegas, LA, and some Carribean. The 767 has better range, but some markets are better served with the 757 to make money. My biggest complaint was no CPDLC/ADS on our 757's.