My parents and I stayed at Carlos' apartment for three nights. Everything about our stay was perfect. Although we did not have the pleasure of meeting Carlos, we were able to meet his lovely wife. She was so helpful in getting us settled and making sure we had everything we needed. The apartment was just what we needed for our stay in Porto. It was clean, safe, and had everything you might need. The location is perfect, you can walk just about everywhere from it. If you prefer to take transit, it is easy to located transit from the apartment. Overall, we had a great stay and I don't think you will be able to find a better place to stay in Porto! Great apartment and host, and beautiful city!