Really nice place! Our room was very cosy and furnished with everything that could be needed.
Since there are many rooms in the apartment, the common areas (kitchen, living-room, bathrooms and patio) are shared like in a hostel. But as a former backpacker, I can say I have never seen a hostel this clean! The place is spotless and other people were nice and respectful.
You'll find everything you need (to cook, to do the laundry...) and we were amazed to see that bathrooms were equipped with so many hygiene products that you barely need to bring yours!
The only downside we could see is that the kitchen may be a bit small when the apartment is full, but it is not that big of a deal.
Be aware that it is a central location (so nice not to have to take the metro everytime you want to move!)- therefore you can sometimes hear some noise from the street at night, but not systematically. But how convenient it is to be located in the city center!
We would definitely go back!