We mostly enjoyed our stay at Marina's home. The room was small but clean and there was definitely enough space for two people to sleep in. We were allowed to use the kitchen and the fridge as well which was really nice.
It was not exactly 15 min into the city by metro but it was still really easy to get there with two metro stations close to the house. The neighborhood was safe and there were some good places to buy stuff and eat (CVS, Starbucks, Dunkin Donuts, McDonalds...).
Marina and her boyfriend were really welcoming and friendly too. The only thing that we didn't enjoy was the last night when they had some friends over until the early morning which kept us awake for a long time.
But all in all we really enjoyed our stay there and we would recommend it as well.