It's a nice place to stay in Lisbon, if you are looking for a clean and tidy place to sleep.
The flat is charming and well located. We were able to visit many things just by walking from there.
The checkin/checkout process was super easy and we felt welcomed.
In general the noise was very reasonable but it's an old building so you will ear everything that the neighbors do! If you are the kind who wakes up easily, you should bring earplugs.
The appartement might be cold in winter so bring your warmest pyjama and you will be in business!