From: Frankfurt, Germany
By all means, yes. But bring very comfortable shoes (my feet still hate me) and a high frustration threshold when dealing with the public transport system. Oh, and lots of money, too - London is an expensive city.
Lots of money I agree with - but I found the tube to be a refreshing alternative to the "walk, walk, walk" option I was using the first few days I was there.
Well, better than walking across the distances we´re talking about in London, that´s true, but far from good. It´s unreliable, the stations are dirty and derelict, whole lines get cancelled over the weekend, some of the stations seem designed to be as confusing and labyrinthine as possible (Elephant and Castle comes to mind as exhibit A here). One of the major crossroads of the tube system, Bank and Monument, is undergoing escalator renovations right now, so changing between tube lines in impossible there. And so on...