The apartment was perfect! Before our arrival the host was very helpful, he contacted me the day before our arrival to make sure everything is ok.
We arrived very early in the morning so we left our baggage in the baggage room and came back later to check in. Apart from the baggage room we could use all the facilities in the nearby hostel so it was a big plus!
It is situated in the center so we hardly used the public transportation, there are shops and cafes within 10 minutes' walk. There are also snacks and coffee in the hostel's cafe.
There is only one bathroom in the apartment but as I said the bathrooms in the hostel can be used as well (the hostel was next door), so we had no problems with that.
The check out was at 10am and we had to vacuum clean the apartment before that so it was a bit tricky. But as overall experience I would give the apartment 5*****.