The pedal box should be insurance friendly... sometimes they struggle to understand what it is if you declare it but essentially its no different to the "sport" mode most cars have these days, its just more adaptable than the fixed settings the OEM provides.
Its not tuning, it doesn't provide any more power than you have already, it just delivers it differently depending on throttle position.
Minis are geared really differently, they are designed to be city cars. A Golf is not a city car...