Cost me £200 to take it from stock to 350bhp and 460Nm. Had the map on for over a year now. 100% worth it. Should have come out of the factory like this. You may have to do some other mods to allow the car to put the power down more efficiently though e.g. dogbone mount insert, better tyres (PS4s, or equivalent). Mine used to wheelhop like mad before those mods.