If this place is available you should book it ASAP. As you can see from the pictures it's newly remodeled and looks even better in person. We picked this place because it's in the center of everything you'll want to see in Porto. We walked everywhere from the shopping at Rua de Santa Catarina north to Taylor's across the river without a problem.
Ricardo was the perfect host. He met us at the house, with a bottle of Port waiting on the kitchen counter with 2 glasses, then gave us a tour while explaining everything. He even took about 15 minutes of his time to go through a booklet he printed with information about the city, the best restaurants organized by price, and all the local historic attractions. If you're looking for authentic Portuguese food then definitely use his restaurant suggestions. He knows where to find great food.
Overall the experience couldn't be better. The only reason to book somewhere else is if this one is taken. Trust me.