We had room six on the second floor with a private bathroom and balcony.
The good:
* Nicely designed house and room. Pretty modern with a nostalgic style.
* Check-in and -out as well as entering the building is super smooth, even at night, because you get a code for the doors (no physical key).
* The location near casa musica is not directly in the touristy center of Porto but approx 2 km away. For us this was perfect, calmer and still an easy walking distance (with a nice bakery for your daily supply of pastel de nata on the way) if you are fit. Otherwise you can take public transport easily.
The bad:
* The room is not really soundproof. If for example somebody uses the kitchen, you will hear them.
* The room was relatively small, for us this was fine, but I think you should know that.
We would recommend the place. We just needed a place to sleep and rest a little since we were exploring the city most of the time.