Bit late with my response... I bought mine new, but preregistered. 60 plate, 0 miles on the clock, bought in 8/2011.
So I've had her about 2 years now. 16500 miles later, still on original chain & sprockets and on 2nd front & 3rd rear tyre (punctured one).
Good bike. If a bit bland & boring... Does everything well enough... Handles well enough, is fast enough, stops well enough. Doesn't excel at anything.
As for MPG - saw a few numbers before of 180 to a tank. I get 140 on average?!?
I must have a loose wrist! :-)
My IXIL full system makes her sound nice at least...