I travelled to Lisboa alone for 10 weeks and lovely Ivete really made me feel safe and welcome.
The location is amazing and I felt very safe. The rooms are very clean and blankets/heater are provided for warmth during the winter.
The flat itself is beautiful and had a great vibe - it was really nice to hang out with other flatmates for dinner on some nights.
I did not stay in this particular room, which was the only downside, but the alternative room I was placed in was still nice and spacious enough.
I would recommend booking this flat, but just double check the room you are staying in beforehand.