I know i have a bias opinion but ive now got the bb tuning ECU on my car and im so impressed.
Car idles the same but revs to 7.8k and i had it rolling roaded at santa pod where my car was hot through doing runs allday and with pipercross open filter and cat-back exhaust pulled 181.7bhp at the flywheel
At Surrey rolling road day which was a hotter day before the chip i only managed 167bhp at the fly AND my car had beeen left longer to cool down
Not saying the ECU gave me an increase of 14.7bhp but its how everything works better together on the car.