Our group consisted of 2 adults and an 8yr old. Perfect spot for our small family.
The beds: quite comfy.
Living space: felt comfortable and big enough to relax in. Really functional small apartment, with everything we needed (even a dishwasher!). Great little outside zone, which our son loved, and a little patio off the master bedroom.
Excellent water pressure, which is something I have never commented on, but it sure was nice.
The location: ideal. A 20 minute walk down to the waterfront, about the same to Crystal Palace Gardens (definitely go there! Playground for kids, food, WCs), close to Clergios Tower and Sao Bento train station. Close to rua cedofeita area where there are very cool shops and restaurants with a less touristy vibe. Close to the market where you can get all your groceries. The street is relatively quiet but weekends can get loud. the bedrooms are not at the street, which is perfect and we slept soundly.
Rodrigo is an excellent host.
Have fun in Porto!