[SteveR]

I've been to all three and loved it. I spent most of the time in and around London seeing everything and getting rowdy with the locals. London is a great city, but the exchange rate sucks and London is currently the most expensive city in the world so be prepared. I planned all my own trips so I never went with a school or travel agency. I know they get good deals on stuff, but there are tricks to finding great deals yourself and cutting out one of the middlemen.