Hi,
Not used them yet, but going to use them to re-commission my 964. Matt, the owner, drove over to Berkhamsted to look at it and I had a chat with him for about half an hour. Seemed to really know his stuff, but also be very pragmatic in his approach I.e Rather than starting with a long list of things he could do to bring it back to showroom, he suggested doing the min. to get it through an MOT and then see how much more I want to spend and what were my priority jobs. He also has access to a trimmer who does targa tops and a paint shop.
I also asked on other forums and he got good feedback there.
Hope that helps.
Nick