Remember, I had 2 Mark 4s which I bought on the back of showroom appeal, interior quality etc. Regulars on here know they were the worst cars I've ever had. The first one reached a total of 17 simultaneous faults at one point. The second one nearly killed me with failing wipers (3 times I might add on the A1, M62 and M1). Thus, my falling out with VW and my daliance with Saab over the last few years.
Regulars will also know that I've had Vauxhalls ever since 1991 when I got my first car and they've consistently been more reliable than those Mark 4s and the Mk 3 GTi I had before them. The Mark 4s did teach me to buy cars on the way they drove and not the way they felt inside. However, when I sold the second Mark 4 I made the mistake of driving the brand new (at that point) Mk 5 GTi and I was blown away with it. I always wanted one but couldn't forgive VW for the crap Mk4s. After several years, however, my anger has abated and so I returned to the Mk 6.
The one thing I couldn't ever deny (especially to me as a private owner) was the high residuals I always got with the VWs. I bought Vauxhalls because I got big discounts through my GM card and the wife getting GM Partner discounts and this made up for the loss of value when I sold them. The Mk4 that nearly killed me retained an unbelievable amount of money at the time so financially the VWs make sense to me. But that's only because this perception of quality perseveres.
My experience in reality though suggests this reputation for quality isn't deserved. Time will tell with the new one.