From what I had read, Wieninger is considered one of the best Heurigers in Vienna. I had visited it only once before and was reasonably impressed by its wine (Chardonnay Select especially), though I had never tried eating there before the goose visit.
A reservation is required, because they prepare the goose on demand only. Even on a Thursday, the restaurant had plenty of customers, but no tourists and thus no annoying musicians/singers, which is always a strong plus. While waiting for the goose, I ate a goose soup (nothing special) and had some wine. The waitress was continuously messing up the wine orders, bringing either the wrong sort or the wrong quantity, but doing this in a very friendly manner. Still, having drunk some wrong wines, I managed to get my Chardonnay Select at the end.
The goose, when it arrived, looked freshly cooked, and the taste was above average. My “goose companions” found the red cabbage too acidic, but I did not feel it was too bad. The meat was a bit on the dry side, but the quantity was sufficient. In fact, it might have been too much, because I could not sleep well the following night. Maybe it was just an unfortunate wine mix.
It was interesting to witness that around 22:00, when most customers had left, the waitress (who may be the owner of the place), sat down at one of the tables and had a quiet dinner alone. To see that the people serving you food do not mind eating it themselves is always a good sign.
Summing up, Wieninger is a nice place goose-wise, probably deserving another visit.