I own a fiat grande punto 1.9 (130bhp) and I was just wondering if anyone has a common rail tuning chip installed on their car?

It claims to reduce turbo lag and improve throttle response however not sure if it does improve mpg and bhp? Claims to put it up to 156bhp or for more expensive models 186bhp thereabouts

If anyone has one please let me know how you find it

-Lewis