We stayed at Joana's place for two days in November. Everything was as expected and more. The apartment is very spacious, clean and had everything needed for our stay. Our communication was with Paulo and everything else went simple and smoothly.
The only downside was a bit of a noise from the cars in the street but we experienced that in all the other places we've been in Portugal so I wouldn't attribute it to this apartment. (It's seems buildings in Portugal are made with weaker isolation then we are accustomed.)
Our primary target of visit was Porto but Espinho was nice to see too.
In summary I would definitely recommend staying at Joana's place.