Thoughtful hosts. Easy to communicate with. The apartment is HUGE and the subway line is literal steps from the front door of the building. Really, really convenient for getting downtown. Building itself is a bit rundown, but there is a safe parking for a car (a bit inconvenient to get in and out, but with the subway so convenient you likely won't need to a lot). I also walked to the University of Lisbon for a conference each morning and the walk was easy, flat, and safe.