We enjoyed staying at Helena and Artur's place. It's compact, but had everything we needed. It's so well located we didn't need to use any public transport for the whole 4 days we were there. We didn't meet Helena bye Artur gave us lots of local info and helped us organise transport to the train station when we were leaving. The apartment's heating was not that effective, so it was a little chilly, but no big problem. We'd stay here again if we were in Porto.