The 6 of us had a fantastic stay in the apartment. The location is great, only 5-10 minutes walking to the very busy central area of Lisbon. The area is a bit hilly/up-and-down but even with my 60ish year old parents, we didn't have a problem.
The communication was fantastic - the team were always able to reply quickly to my questions and helped us organise transport from the airport.
The apartment itself is extremely stylish and spacious. Beds are very comfortable, kitchen well stocked for home cooking, and lovely views for sunset (despite being on the ground floor). The only thing I would say could be improved is the shower - they only have waterfall showers, not shower heads - but this is personal preference.