I'm planning a trip to Milan and came across the Hop On Hop Off Milan (https://www.hop-on-hop-off-bus-tours.com/tour-city-sightseeing-milan-hop-on-hop-off-bus-tour) buses. They seem like a super easy way to explore the city without worrying about navigation, but I'm not sure if they're actually worth the price. Do these Milan bus tours cover all the major attractions like the Duomo, Sforza Castle, and shopping districts? Also, how frequent are the buses, and do they get overcrowded during peak tourist seasons? I'd love to hear from people who've tried it—did it save you time and effort, or would you recommend using public transport or just walking around Milan instead?