I have a unichip.
www.airpowersystems.com.au will tell u all about them,
My mods are; 3in full exhaust, air-pod, unichip, fmic. With the unichip tuned, I got 180kw [260hp] at the wheels, [before the unichip I had 134kw atw or 190hp] now I have much better fuel consumption, better acceleration and other benefits.
The unichip comes with its own boost controller which the tuner sets the boost throughout the whole rev-range, so with further mods I can tune the air/fuel/boost safely.
With my new turbo, dumppipe and tubular manifold, and Bosch fuel pump and a re-tune I should be looking at about 220kw [just over 300hp] at the wheels. Not too bad for a piggy back.
While your at the unichip site, have a look at the new Ford XR6 turbo ute they have using unichip, doing low-11's, n the tuners aint finished yet.