One feature that interests me about Hop On Hop Off Milan (https://www.hop-on-hop-off-bus-tours.com/tour-city-sightseeing-milan-hop-on-hop-off-bus-tour) is the audio guide. Is it informative and engaging, or just basic commentary? I enjoy learning about the history and culture of a city while traveling. For those who've used these Milan bus tours, did the audio guide enhance your experience? Are there multiple language options available?