Can't speak for Bluefin on this one Dan, but with an Evolution Chips remap, you should see between 10% and 20% better fuel economy, nearer the 20% on a long run on the motorway unless you're driving at Vmax everywhere
On the 2.0 TDCi 130bhp engine you can expect a 30bhp increase and 55NM torque.
RRP is £359 inc. VAT and fitting