Have you seen cherry stone the size of a walnut with 185 individual faces carved into it? How about a goblet draped with diamonds with a elaborately carved dragon holding an ivory elephant? This is indeed an overwhelming example of opulence. Read up on the Grunes Gewolbe on wikipedia beforehand because the history of the collection is quite interesting. The audio tour was well worth it. Allow enough time. We had no problem getting tickets the day of travel, but we went right away to the ticket office. In the summer, you may need to get tickets ahead of time. Be sure to visit both the "timed" ticket and the "new" exhibit with open timing.