The apartment is very well located, everything's in walking distance, there is also a shop right next door that is open till 00:30. It would be perfect for 2 guests, but not the most comfortable for 4 people. The bed is fine, but the sofa is not too comfi. We made a reservation for 4 people, but they only provided bedsheets and towels for 2, the only thing we could do is to share, because we only spent there 3 nights, but it was a bit disappointing.
Side note: from the airport use the metro all the way to the apartment, it's the easiest and cheapest and DON'T go outside the terminal's building, because it's almost impossible to get back, follow the metro sign INSIDE untill you find it!