We stayed at Simone's place for 3 nights over the weekend and it was great. The place is clean and very easy to find, either by metro from central station or even a walk away. It took us about 15 minutes to walk down to Central station from the flat. Simone is great host, gave us tips and was helpful. The place actually is bigger than the pictures show, which is great. There is a great supermarket around the corner and the flat has everything one would need to make a breakfast or any other meal at the flat. Flat is just off Main Street so felt safe even when walking in the dark.
The flat also have a web pocket wifi system which is great if you want to save money on roaming. All in all i would recommend the place and Simone as a host. Had a great time and would look to book again when next in Milan :)