Just fitted one to my Cento and its really pepped him up.
You get around 3bhp more but driveability is sooo much better.
It just feels "alive".
I can imagine,this is what the car felt like when new straight from a dealers showroom.
Just a quick technical thing.
If your IC has NOT got the little plastic cover over it,the chip is soldered thru the board and will be a real pain.
If you have the plastic cover over the chip,then this could not be a simpler job.
Do it,you won,t regret it.