We (2 adults and 1 baby) had a great time in this really wonderful city of Porto. We never met Claudia but communication via Airbnb and Whatsapp was no problem. We directly found the apartment and used the provided code to enter the house and apartment.
The apartment is located in the 2nd floor of -a bit narrow - town house. The house is located on a road, keep this in mind if you are sensitive to noise. Walking distance to old town is approx. 15 minutes. The apartment is really modern, cosy and clean. We found a equipped kitchen, even with induction cooker. Free Wifi was as well provided as a smart TV and towels (we got 1 pair/person for our stay). The space the apartment offered we experienced as a bit limited (due to the architecture). Though, for that price and for 1-2 guests we definitely can recommend the apartment.