I really enjoyed staying in this place to see the city and to work for some weeks, the WiFi is strong and fast and I never had a problem with that.
The studio was a bit cold in the last week (only because that week was unnaturally cold in Lisbon and it was end of January).
Apart from that the place is really good and in a good position to see the entire city and really close to the metro stop Martim Moniz just a couple of stairs. In 5-10 minutes of walk you can also reach the castle.
I can recommend the studio!