We had a great stay at the Blue House. Carolina (the apartment manager) is very easy to communicate with before we arrived & during our stay. Check in and check out were extremely easy. Thanks for that!
The apartment is very central and in a safe area, with plenty of restaurants and bars close-by. The metro system is just a 5-10 minutes walk downhill, and it's super-easy to get to the apartment via metro from the airport. If you choose to taxi, it's about 15Euros to/from the airport. The apartment itself is on the 5th floor of the building, so make sure not to bring a big suitcase because it's on the top floor! The only thing that could be improved is that the water pressure... the shower head has to be held in your hand for it to work (minor problem). Overall, it's a great, spacious place. Thanks Carolina for the nice stay!