I stayed in Estefania's flat with two friends and we really enjoyed our stay. The place matched the description and the photos with a stylish look as well as being practical. We used the patio in the mornings for breakfast and some evenings to relax.
The place is about 10 minute-walk from the heart of Porto. The area, Vila Nova de Gaia, is quieter and less touristy than Porto itself, which we liked.
We went out a few times on the river banks on the Gaia side with a splendid view over Porto at night.
Communication with Estafania and her brother was good, prior and during our stay. Highly recommended :-)