Jeronimo's apartment is compact but sufficient for a couple. It was very clean when we arrived and proved to be very quiet at night. We didn't actually meet Jeronimo but were greeted by his friend Francisco who was extremely welcoming and explained all that we needed to know about the accommodation and, indeed, the town. We arrived quite late in the evening and he was able to take us to a local cafe that provided a very good (and vegetarian!) meal with a delicious carafe of local red wine.
The kitchen/dining room has a cooker and microwave and all the usual appliances. Most seem quite new. Regrettably there is only one electricity outlet so certain items cannot be used simultaneously. This did not prove to be a great handicap.
The bathroom is really a shower-room but it is an excellent shower; powerful and holds a constant temperature (the water can be very hot though - take care!). There are also a wash basin and toilet. Not too much space left after that.
Just outside the bathroom there is a generous wardrobe and the bedroom has a comfortable double bed.
The apartment is on the first floor and has fairly steep steps that may prove difficult for some guests; especially if carrying heavy luggage. There is, as far as I am aware, no elevator so the place would be inaccessible for anyone in a wheelchair. As far as location is concerned, it lies between the centre of town and the nearest Metro station. It was a short walk (5 minutes or so) to either.
We happily recommend it to anyone spending a few days in Porto.