Our stay at Roberto's and Elena's place was amazing. We were greeted by Roberto who was very friendly and helpful and gave us a lot of tips. The place was very well organised and the beds were comfortable. Our room had a balcony from where we had an amazing view to the canal. The centre was very close (Duomo was 20 minutes by walking) and the air bnb itself located near the canals, where you could find numerous bars and restaurants.
I would definitely recommend staying at Elena's and Roberto's place if you want a simple room with a great location and with a warm welcome. We also met the cat Missy, who was a bit shy but a very sweet creature :). If you're planning on staying in Milan, this is definitely the place to choose.
All the best,
Kerli and Jenna