Hop-on-hop-off bus tours are always our first go-to thing to do, if for nothing else to get an overview of where things are and get a sense for the lay of the land. Obviously, roads are narrow and crowded, so depending on the time of year, it can take some time mostly sitting in traffic. This particular bus did not have all of the route options of the competitor, so it wasn't the best for using it to get from one place to another. The City Pass portion wasn't really needed by us, since we had a bunch of other excursions/tours planned, but would certainly be useful of you are planning to see a lot of museums which we didn't have time for, unfortunately!