We liked our stay at this place. We got nice tips from António & Fátima.
Negative to mention is that the furniture is quite old (which is not a critique, it was shown on the pictures), the bed is not really comfortable and it's quite noisy (from the street and from other roommates). If you know that, however, it's a great place to stay. Also, check-in at 5:30pm is quite late and checkout at 10am quite early in my opinion.
Positive to mention is great communication, easy check in, very nice hosts and great location. Also, the place was very clean.