Since joining the forum I've read about many a car undergoing a remap. Feedback has ranged from 'I felt no difference and will be going back to get it unmapped and a refund', to 'noticable throttle response particularly at low revs and far smother through the rev range'. A place on County Durham has been recommended with rolling road and 'nopayment unless you're happy with the remap' policy. They seem very reputable.
I'd be very greatful if those with the bigger engine E46s could share their remap experiences here.
On a side note, my insurance company state they will not insure a remapped 330 M Sport. However,my (off the record) argument is that in the event of a road traffic accident, a cars ECU is not checked but rather a regular once over by an approved mechanic to make sure no obvious mods haven't been declared are present. Hence, why should the insurance company be told about a remap. Did you? What was their response?