There were some pros and cons regarding this place.
Pros: Clean, central, spacious, next to the nightlife and restaurants and a cheap stay too. It is great for a few nights, in my opinion no more than 3 people, the bed downstairs isn't that big even though it is double-sized sofa/bed
Cons: When we arrived at 10pm we were told that we had to pay 30€ extra for arriving later than 8pm (we hadn't read that anywhere before). The flat is quite cold and we stayed there in March. Not much natural light, although we were out all day so it wan't a problem. The last thing is that the boiler leaked a little from the first night there, not a big problem-just in case. :)