Manuela and her husband, Jorge, were great hosts to me and my friend. It was our first visit to Porto and they did all they could to make this trip worthwhile for us. They gave us a map and told us a list of things to see, and also went out of the way to drive us around the city in their car.
As for the place, it was amazing. The bedroom is actually much better than it looks in the picture, with a private balcony and private bathroom. The house also is very close to a metro station, so the location is great as well.
If you are planning to stay in Porto, I would say just go for Manuela's room without any second thoughts.