yeh i have seen good milage from it, far better than my 1.8 petrol focus lol.
i have avr 55-60 mpg on motorways and 45-50 around town. im verry happy with it. as said before its a verry annoying thing as there are no tell tale signs of it going faulty. if you have the radio on you pro wont hear it. and then its to late. if it goes completely it will be a new gearbox and maybe engine. the only tell tale symptoms i had was a slight nock (noise not feeling) when the clutch was pressed. under driving no noise, when in neutral no noise. id advise everyone to check out there clutch it only takes a min. turn the radio off, press the clutch and listen for a unusual nock.