We spent four nights at House of Peace at the end of April. It is exactly as the photos suggest - clean, comfortable, a lovely place to stay. Well appointed kitchen with basics and a lot of spices, which is very helpful. Great location in extremely quiet neighborhood. Just a few minutes walk to restaurants, groceries and the metro to downtown.
Maria met us and explained everything. She stressed that she was available if we had any questions, but they had everything set up so clearly that we never had reason to call.
Porto is a great city to visit and we had a wonderful stay. Highly recommend this apartment.