My wife and I visited Milan for our wedding anniversary and had the pleasure of staying in Rosaria's apartment. It is located on the top floor of the building above Rosaria's own residence. It's on a quiet street no more than a few minutes walk from the busy shopping streets and restaurants. We found everything was within walking distance.
We arrived early and were allowed to check in immediately as the apartment was ready, allowing us to start exploring the city. It was simple and hassle free. The apartment was spotlessly clean and stylishly decorated. It felt like a home from home. Rosaria had left everything we needed and more (Plenty of fresh towels, milk, butter, water, coffee, tour guides). The apartment also has a terrace ideal for breakfast, or drinks in the evening.
We definitely recommend Rosaria's apartment for any length of stay and would book again if we return to Milan.