We were a group of 4 women ( grown ups). The place is comfortable for a party of 2 or 3 the most specially because there is just one bathroom. There is plenty of space ( 4 bedrooms) however the heating system monitoring specially during the cold days in Porto was not the most comfortable situation for us.
The location is great since it's walking distance to the center but it's on the bottom of a hill ( giving the fact that that is how Porto is layed out). Cristina is a polite and kind person, she provided us with bread, coffee and milk for our first morning breakfast. There were some issues with the lights about turning them off ( which it was not explained to her before hand) and by recount of my other companions none of them turned it on at all, but they kept turning on by themselves even in the middle of the night, we don't really know what was the situation, but maybe Cristina will let their future guests know how to monitor the lights as well.
Porto is an amazing city and I will definetely go back. I wish Cristina well and the only thing I will suggest to give better directions ( before hand on how to reach the place) that was not smooth. The issue of the heating is a main one. I come from Boston so it didin't bother me that much but the other people in my group coming from Latin America was not pleasant and they complaint about it.