Me and girlfriend stayed here for 4 days and really enjoyed our time there. The apartment is in an ideal location, walking distance from all the most interesting areas of Lisbon and it was easy to find.
Inside it is immaculately clean, with modern fittings and we even had coffee provided which was a nice touch. The outdoor area is fantastic and gets a lot of sun and is ideal for during the summer when the weather is good.
The hosts responded to all our communications very quickly which was useful for us, and were able to accommodate us arriving very late (1am), with a friend of theirs, Sergio, letting us in and giving us the keys. Sergio also took the time to sit us down and give us as much information about Lisbon as possible, despite how late it was. We found the information he gave us really useful as it felt like an insight from a local.
Overall I would thoroughly recommend staying here!