Staying at Manuels place was the best choice for Porto. It's a new renovated flat in the third floor in a safe and hip neighborhood. The apartment is very clean (inclusive bathroom!) and big enough for 2-4 people. Manuel takes his time to give you a approx. 1 hour talk about the city. He also prepared a big travel guide with all the infos about Porto! If you want to enjoy the city, stay at his place!