We were a group of 5 friends and had a great time at Elena's apartment. It's beautifully decorated and situated in the center of Milan, walking distance to Duomo (20 min), Navigli (10 min) and other nice places. It's on the top floor (5th?) without elevator. There's a kitchen, fridge, and all you need. The beds are comfortable. Elena offers help whenever possible and gave us tips for Milan and the Expo. We met Elena in person when we checked out and learned that she lives at the apartment when it is not rented out.
I give top grades for location and atmosphere. Even more than top grade for the decoration ;-). The only minus were the mosquitos in the top left room, which we had some trouble to fight. Overall 4 out of 5 points, because expectations are high given the price.