I really enjoyed staying here. I only spent one night, but would definitely have stayed longer if I had had more time. The apartment is lovely. It's on 2 floors, so the bedroom is totally separate from the rest. It's in a very non touristy part of Porto, but quite close to the train station and the old city. It's very tastefully decorated.
Ines was very easy to communicate with - she's very responsive. The place seems like it might be a little hard to find, but its not a problem, and you can mapquest the location. Using the lockbox to check in is very effective.
The only downside was that there was some street work in the morning. But I assume that's quite temporary. I would definitely stay here again. The apartment is very good value.