Audi A4 2008 08 143 - Remapping
 

I drive an Audi A4 2.0TDi 143 2008 (08) - Thinking of getting it remapped. Two work colleagues have had their cars remapped with Motech (1 has 04 Vauxhall Astra and other has 07 BMW 520D) and recommend getting an ECOMAP. This gives an extra 40BHP plus added MPG if driven sensibly.
Has anybody has this done? Any known problems? Please help.