We had a nice stay at this airbnb/hostel. The kitchen was well stocked, with lots of space to put groceries if needed. There are three shared bathrooms and two of them have working showers. Since it is an old building, it can be quite noisy from the people staying in other rooms. This room, however, consists of a bedroom with a door that shuts, plus another room with a desk — it was quite a big space and you really couldn’t hear much after closing the bedroom door. AC and WI-FI both worked great, too (I had several video call meetings and had no issues with the Wi-Fi).
Like all the reviews say, it is quite the uphill walk from the train station and back down into the other areas of town, but twice we took Ubers, which are cheap and able to get to the location easily.
There are two markets super close by, a coffee shop, and lots of cheap and decent Portuguese restaurants at the bottom of the street. Very close (5-10 min walk) to the Rossio train station and a busy walking street area with lots of restaurants, too.