This apartment is great for two. The house is on a busy little square with restaurants and street musicians till late, which is great, and the apartment and all its windows go out to the back so it's still quiet if you want to sleep. There's even a balcony, not wide enough to sit, but you can stand outside and see some of the major sights right there. Also, the interior is very clean and stylish, our host was friendly and gave us some awesome tips for Porto.