Our stay was great at Sofia's tiny house! Looks way than it does on the pictures here. Communication was perfect, we got many tips and recommendations. The Place is very clean and well equipped. The only not perfect thing is the location, you have to use some Kind of transportation to get into the City Center. A Tip from us, dont use the bus it is not reliable, Uber is the same Price and way faster.
Yet, if we come back to Porto again, we would stay at Sofia's :)