Being a tube user in London over the last 15 years I cannot say the London tubes are efficient. The only good thing is they run pretty much everywhere.
They are not cheap either!
Quite interested to see what the new Vauxhall Insignia VXR will be like.
Eibach Sports springs, Evole Remap, Quafe LSD, AR Downpipes, Forge FMIC, Hart'ge Quads, BMS Intake.