They swing by on shuttle buses to different hotels to bring people up. No menu-- they just bring out multiple plates for each course and endless house wine. It was a very nice evening with friendly hosts, but you should definitely insist on going at your own pace so you don't get lumped into the fast-paced dinner and then shuttled back down. At €35 each, this was a worthwhile and memorable experience, just make sure you go at your own pace, walk around to see the whole restaurant, and avoid being shuffled along with the others that came on your shuttle.
While it was something different and a fun atmosphere, I do wish the food had been a little better. With the whole family-made style, I was hoping this to be the best meal of our trip, but some of the dishes lacked the wow factor. The appetizers were the best part. By the time of year we visted (mid-September), the sides were all covered by clear plastic tarps, so we really weren't able to get the full vibe of the view that I've been reading so much about.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.