Nunos place was great! Check in was very easy and there were even some pastries and wine for us when we got there. Nuno was easy to work with and responded quickly to everything. The location is about a 15 min walk to Rossio station (if going to Sintra) and even closer to another train stop if you are coming from the airport. The street is quiet and residential which adds to the charm of staying in mouraria. The one downside was the apartment was a little dirty, but we did check in early so some steps may have been skipped to accommodate us.
Overall I would definitely recommend the stay here.