I stay at Elena's and Carlos' for a weekend during a business trip in Milan. I arrived pretty late at night, however the self check-in system they have invented allowed me to check-in very easily (and is was amusing too!). The apartment was very clean and comfortable. It is extremely well located, just 3 minutes walk from the metro. Since I check-in late, another nice surprise for me was also that there is a 24/7 supermarket really close-by. In general, my stay at Elena's and Carlos' place was very pleasant and I highly recommend it!