We had a fantastic time staying in João's place. It's located very central in Lisbon, and great for going out at night. The apartment was clean and very comfortable, and João was extremely communicative and helpful throughout our trip. It's very easy to walk to the main train stations from the apartment, and it also wasn't hard to get a taxi from the top of the street. The apartment is in a beautiful old hilly part of town, so you will be walking up and down a hill to get to it, but the views are worth it!