Overall it was good. Queues at the bus stop at IL Duomo and the usual jackass with no patience barging their way through but I guess that's to be expected at a major tourist spot. We always got a seat on the top of the bus and never had to wait on a later bus. Given that it was the Easter holidays, one would expect it to be busy so no complaints. However, there is graffiti and trash everywhere and the city of Milan is dull compared to other major cities and not very family friendly apart from City Life area.

Once found was excellent

Please don't make the same mistake I made trying to find the office with the map I was given when purchasing the tickets. Go to the Milan Visitor Center. We looked for two hours and was given 20 different places from the locals. Next time I will ask for a address. By the time we found the hop on hop off stop we could only use it for one day and purchased a two day ticket.

Great experience

This is a great experience. I just wish it would have listed the pick up from the train station on the first spot. Instead it listed one that was closer to downtown. I loved that the bus was open air on top and it dropped off in great locations for all the things I wanted to see. Great price too. Also a little thing that would have made it a little easier would be if the stops were called out in English as well.