I reccomend this service, as with it you have the possibility to use public trasport and to have suggestion/ hints of where to go and what to do. I bought the city card but i suggest the city pass for more cultural tourists, as a lot of tickets are included in that one.
... we used the pass mainly for local traffic.
The Pass was very easy to use, it really simplified the trip and travel in Munich!
The card covers all transportation within Munich. It is very convenient. However, there may be redundant like me as I have purchased the Germany Rail Pass which covers S-Bahn's bus and trains. The card will offer certain discount for some attractions. Nymphenburg is one of attractions which is highly recommended.