i read some where a few times that people have been less than impressed with the bluefin superchip on there rs or other blue ovals,makes them run rough and bring the engine management light on,but have also read that they seemed to make a difference too, have heared lots of good reports on the dream science unit which has punted out some good results,but like alex said cant beat a life map as it get the best from the car as it is under proper load on the road.
alex seen your feature in fast ford nice car you got there m8ty bit of a que car nice surpize for the unexpecting lol
at the end of the day its just matter of picking the right ecu/management for the job to get the most from the mods and from the car its self, but not only this it really depends on how good the mapper is to get the best from your car.
might be a good test to see which ecu/management/chip works best on the rs focus on a std car , one with a few mods and a heavy mod one to see which one comes out on top for power etc but also is valve for money too
ps glad superchips got your car sorted m8 just need to get it on the old rollers to see if there is a difference