My husband and I stayed at Elena's place while visiting Milano for a few days to attend classes and see the city. Elena's colleague was there to check us in and answer any questions we had, and Elena was also accessible via phone. The location was perfect, just around the corner from a metro stop, and a less than 10 minute ride into the historic center. a few things that seem worth mentioning:
1)You may want to bring your own bottled water, as the tap water did not taste very nice. This wasn't an issue for us, though, as there was a bottle of water left in the refrigerator for us, and a small shop just down the street where we could get more water.
2) The apartment is next to a family with young children, so there was a good amount of noise throughout the morning and afternoon. We didn't mind, as it was very quiet in the evenings.
Overall, we were happy with our stay and would recommend!