The best thing about the place is the location to be honest (although prepare for some stairs). Close by you have some of the nicest cafes and restaurants I've been to in Lissabon and it's easy to get to some of the most importabt landmarks if you are a tourist. The room was bright and spacious, I was working remotely for 4 days during the week and there wasn't a lot of noise during the day or night, wifi is strong. The building is quite old so it was quite cold in the room with 15-20 degrees outdoors, for very hot days there is a fan.
I didn't use the kitchen at all, and personally the bathroom brought some discomfort but for a short stay it was good enough.