We had a great time staying at Serena's. Even though our flight was significantly delayed, the check-in went smoothly. Serena had given us very detailed directions from the airport and we found the apartment quickly without getting lost. The place was clean and looks just like shown in the pictures - it was definitely big enough for the four of us. The location, while not being directly in the city center, was convenient for transportation and there were a few nice cafes and restaurants nearby. Serena had also sent along a PDF with recommendations, which helped us decide where to have breakfast and dinner. Her recommendations were spot on and we had a great time staying in Milan. I'd definitely do it again!