The apartment is in a perfect location (noise from the restaurant and street doesn't bother me really), clean, good for 2 or 1 people, and even have a big table if you need to work, the internet is also fine.
The reasons I gave it 4 stars it's: the kettle was broken and cockroaches were all over the apartment and eventually even in my backpack. There is probably not much Sergio can do about it, because of all the restaurants around, but the price for the flat could be better in this case.