Although Londoners complain about their public transport, it really is exceptionally good. For many routes within London it's quicker and far cheaper to take public transport (or a bike!) than to use a private vehicle.
While I would say that London's public transport is good (not exceptionally good, Germany, Switzerland and Japan are exceptionally good, London is merely good), I think:
> For many routes within London it's quicker and far cheaper to take public transport (or a bike!) than to use a private vehicle.
Is a rather poor way to look at it in the context of London, because walking is often quicker than using a private vehicle here!
Most places aren't like that, unfortunately.