Beautiful, clean and cosy flat with everything you need. The location is excellent; just a few steps from Rossio Square, where there's a train station, metro, tram and bus stops so its a perfect base for exploring the city. It's also quiet so you get none of the noise from the square.
Juan was extremely helpful and welcoming. He greeted us with some Pastel de nata which was a nice touch especially after a long day. He sat down and showed us the best places to visit and how to get there. He even let us check out late on our last day, which we were extremely grateful for because we had a big suitcase and a child to deal with.
Having said that, if you do have a child or a lot of luggage then there are some negatives: you need to walk up a steep hill and some steps to reach the building, then there's two flights of steep stairs to climb to get to the flat. But I'd still stay here again due to the location and value.