Easily the best visit in Milan for me. Inside the Duomo is beautiful, but the museum (underground) was really good & clambering about the rooftop was amazing. All worth the 30 min queue for tickets & the 60 minute queue to get in! After all of this, we skipped the queue for the rooftop elevator as would have taken all afternoon, instead going back an hour before it closed, when we got straight up - really pleased we did this!