Got to agree with RR's comments, it does not matter what marque you buy, it's the individual dealers that make the difference.
In my experience of VW ownership in the last 6 years, every dealer within a 40 mile radius is poor, and they certainly do not appreicate good customer service or relationships, and due to this, once the GTI goes, its our last VW, because even complaints to VW customer service only get the 'well we do not control each garage, they are franchises', at that point you are on your own, and I had 7 months of hell getting a steering fault fixed last year and it soured the view of VW that I have.
In the last 20 years I have also owned BM's continously, and again some dealers are rubbish too, but overall my experience has been a lot more positive, and for this reason I stick with the brand, but it really comes down to finding a good dealer that you have faith in and building a relationship with them, so that they totally understand what you expect of them and what you will accept in terms of service.
For what are high value items, it should not be like this, but unfortunately it appears to be the norm throughout the auto industry.