Carlos was an absolutely AMAZING host! He is such a kind and friendly person, and really made me feel welcome in Porto. He met me at the train station upon my arrival, pointed out places to check out on the map, invited me to coffee with his friends, helped me find my lost phone, and even drove me to the airport in the middle of the night. What a guy! His apartment is also very nice and is in a good location! I would highly recommend staying with Carlos!