Had a great stay there! Location will suit you perfectly if you want to walk around the Porto center, or dedicate a few days to exploring nearby towns (train station is within 8 minutes walking distance). The apartment itself is very clean and all basic needs are there.
Note that you have to take a bus or tram to get to the ocean from this location. It's not a long trip, but 5km is 5km :)
Also, if you'll get asked whether you want to have a private transfer from the airport, go for it! You'll meet a very welcoming and polite man who will answer all your questions on the road (and it's cheaper than Uber!).
Thanks!