I have used Heritage a number of times. Apart from an issue with non-VW springs being fitted, which was resolved by the Senior Service manager, they have been very good. They fitted the new engine quicker than originally planned, and have overhauled the front anti-roll bar which had seized drop arms in time to hit a ferry booking.
The body shop at Westbury (now owned by MG Cannon) is also excellent for Cali bodywork.
Alan