We had a great time renting Cristinas apartment, she responded quickly and helpful on all our mails, helped with transportation and even personally welcomed us late in the evening when we arrived.
The apartment is spacious, clean and has everything you will need for a nice stay in Milano. You can walk to everything or catch a tram or metro nearby - and the Navigli area is filled with nice restaurants and bars next to the canals.
If you're a light sleeper, I would recommend that you bring some earplugs with you, as there is some noise from the trams in the street - but for us it was not a problem.
I can highly recommend this apartment and I'm sure that Cristina will do everything she can to make it a pleasant stay as possible, like she did fo us.