Again it is one of those questions you have to ask yourself
"Do I trust a guy to come to my house, hook a mobile up to my car, allow him to "remap" it and walk away with £300 of my hard earned cash?"
You also have to ask yourself
"How do I know that I have just gained XXbhp?"
"How can I tell whether the remap gives an increase that is smooth across the rev range?"
My advice would be to avoid mobile remappers and spend a little extra and go to a respected VAG specialist who can rolling road your car to show you exactly what you had before and after the remap.
