Not world class - Just got back from a trip to London. The Tube system (Mind the gap!) and the buses are what make that city truly world class. Fast, frequent, and on time. A little expensive if you don't buy an Oyster pass (smart card) but worth it. And a smart card payment system is one thing that could really make a difference for SEPTA. I know, they're "working on it", but it's been endlessly delayed. They key is to make it usable on connecting transit systems as well, such as regional rail and NJ Transit.