We loved staying at Daniel's place. It's a perfect apartment if, like us, prefer beautiful clean proportions and a lot of light.
The apartment is centrally located in the busy part of town but to our surprise the windows do a very good job of blocking out most of the street noise. We liked being in the center and slept very well at night. Daniel was extremely accommodating and even let us check out a bit later, even though I know that it wasn't perhaps the most convenient thing for him. Next time we are in Porto we will definitely stay here again!