Henrique is a really good host. He was on time and really easy to reach by phone or email before and during our stay. The apartment is exactly like the pictures. It's clean and well located (close to the metro and some good restaurant in front of the Coliseu building). Everything was perfect, I would recommend Henrique's apartment for sure. We didn't enjoy the balcony, because it was raining during our vacation, but it was pretty quiet due to its exposition (a parking), where you can hear the seagulls ;)
If I come back to Porto, I would definitely try to book it again! Don't hesitate!