We stayed here for 8 nights very recently, in the Oporto Attic apartment. The apartment was fairly small but very well presented, and the balcony was great with plenty of space to sit or sunbathe outside (the balcony is south facing so we had the best of the sunshine for the whole day!). The apartment was very clean, the only point worth noting is that it is on the top floor of the building, over 60 steps to get there with no lift; this was not a problem to us but something worth noting if you have any sort of mobility difficulty!
The host, Sara, was in contact a couple of days prior to arrival to check our arrival time, and was most helpful throughout our stay, even helping with booking us a taxi back to the airport at the end of our stay!
The location of the apartment was ideal for us within the city, everything was walking distance and there is a metro station roughly 5 minutes away. There is a small supermarket across the road which was handy for gaining supplies (the kitchen within the apartment had a small fridge, and a hob and microwave).
All in all we would highly recommend this little gem of a place! Thanks again to Sara for being a great host.