I have used it for ages in this and previous car, can't comment on effects with a standard ecu but for me it made for smoother running, fuel burnt differently so needed to adjust ign dwell etc and fuel injetcion timing could be changed to improve ... that was using Motec. For Link it was all just smoother and more refined. Whilst I could never advance my timing significantly using just Broquet it certainly made the car more consistent on what I had, less likely to det etc. Fuel economy was better as well when I ran with Motec using the closed loop lambda control function. With Link I could lean the fuel map to achieve the same afr. Quite interesting really. I've had it so long its just part of the "furniture" but if it was removed I would notice the difference. I did some back to back power/torque runs when I put it into the "5" and with identical maps no real difference was seen, then I twigged it had richened up the afr so leaned it a bit and then it was better.

my two penneth ... "flame suit on"