GSA have been servicing my car for a number of years and have always done a good job. They will ring for confirmation if they are going to do something more than what was expected (ie: more cost!). They seem to do what is necessary without going overboard. Generally, they are easy to book into within a week. They don't have a service to run you to work, but if you are wanting to go closeby (as I have on one or two occasions) they did run me over and pick me up later. Service cost is not dirt-cheap, but I think it's comparable to others and I appreciate that they don't seem to do stuff that isn't required.