The apartment was fantastic. I got a private room with a bathroom, a balcony, a small sitting room with a small fridge and microwave.
Claudio is friendly, fast to reply, and passionate about Milan. I was there for a business trip so didn't have much time for sight-seeing. He recommended me the Duomo (cathedral), museum, and Teatro alla Scala (opera house). For the Teatro alla Scala, he also showed me which shows were available and the time. I went to a ballet with music by Tchaikovsky and really enjoyed it.
Lastly, the price was also reasonable at the time of my booking. Definitely recommended.