You won’t find a better located home for your stay is Lisboa. It’s close to Pasteis de Belém, the Belém train station (which goes to Cascais and Boca do Inferno), MAAT and much more. The proximity to the waterfront means you could even bike to the Time Out Lisboa market. I would stay around here over any other neighborhood in Lisboa if given the opportunity to go again.
The room is a fair size, certainly enough for a couple on holiday in this city. Some considerations are the shower is definitely built for one and there is one flight of stairs before reaching the studio. If you have a tendency to get hot, the room may be warm, but there is a fan and great ventilation with the window and balcony door. By no means, a dealbreaker, however.
We were able to contact Luis via WhatsApp and he was helpful and responsive. Make sure you ask him the tricks about unlocking the door!
Muito obrigada, Luis!