On one of my deliveries, I spoke to a former service manager for City Holden. When I mentioned that Opel were setting up shop in Adelaide, under the Adelaide Motors Group, he said he had a mate who worked there and said they were shifty as ****. Then again, he also said the same of Maughan Thiem Ford/Hyundai, of which I could certainly vouch for.
My hope is, the kind of experiences I've heard about don't transpire to potential new Opel owners. Then again, this list is only the beginning. I'm guessing as sales get going, there will be more dealerships popping up all over the place.