This is a really convenient place to stay if you're visiting Milan on your own. It's a traditional old Milanese apartment building, really well located close to several different metro stations, with lots of shops, bars, and restaurants nearby too. Within walking distance there's a range of different areas: Brera is a pleasant old quarter of Milan, Isola is a cool place to go in the evening, and Milan's Chinatown is really lively and interesting. To get to the centre of town you can take the metro, but the walk isn't far.
Enza is a really great host - very friendly, always available to help, and eager to emphasise that I should treat the flat as my own, so I could come and go as I pleased. There's even a breakfast included, which is a nice bonus if you're on a budget.
All in all, I'd heartily recommend!