This is a great apartment, and I've very much enjoyed it during my two recent stays in Lisbon. I'd recommend it not only for its cleanliness and amenities, but also for its proximity to Príncipe Real, Largo do Rato (including metro station) and São Bento. Really the only downside to this property that I can think of is that it's located on the fourth floor of a building without an elevator, on a very steep street. This makes it less accessible for some travelers, but for my purposes, it was fantastic.