Silvia is a very lovely and helpful person. We never met her in person, but she gave us a lot of tips and suggestions for the trip. Moreover, inside the apartment a lot of helpful devices are usable for free (maps, books and two little bottles of wonderful port wine ;)). Especially the mobile hotspot was very helpful during the exploration of Porto.
The apartment itself was very clean, cosy, and well-decorated. Everything was as described and much more as aspected. We (2 persons) felt like @ home.
We can recommend a stay in Porto and especially at Silvia's apartment.