Cristina's flat in Porto is fantastic...both in location and accommodations. I spent two nights in Porto and was able to use the flat as a launching point to visit the riverfront area as well as the old city away from the riverfront. Upon arrival, Cristina took the time to familiarize me with the local area and provided ideas for things to do, see, and eat.
Should I return to Porto, I will definitely look to stay in Cristina's flat again. Highly recommended for any duration of stay in Porto. Thank you!