I'm 1500 miles into mine after 2.5 weeks. 3 tank fulls so far. Averaging 41 mpg. However, on longer motorway drives it's up around 50mpg. I reckon if you had a long journey to do on motorways you'd get 500+ miles on a tank [approx £73 to fill]. On mixed running its about 420.
Still smiling. Getting used to the drive and it just gets better and better. Acceleration in sport [+] mode is super quick. In Eco mode its sluggish. I've started jumping between modes depending on desired acceleration.
Really really happy.