Hi Chris
Yes I had it done Nov 2013 time and gareth at Avon tuning was very helpful. Went for a economy map initially but found it smoked on acceleration as the fuelling was too high in the lower revs. In the end settled for standard level 1 tune with EGR blank and DPF sorted. Think carefully about the latter before doing it as come MOT time it makes for a few hours biting nails whilst you wait to see if it went through.
Over the last 14 months I'm sure it's lost power, but I expect it's more I'm used to the extra few ponies by now!
A bigh benefit to the EGR blank is not having to worry about cleaning the EGR and EGR return pipe every 6K miles