We stayed at Juan's Apartment for two weeks and really enjoyed it!
The apartment includes a dishwasher and washing machine, which was really convenient.
The location is right at a metro station, from where you can basically get everywhere in Lisbon for 1,50 €. But also Bolt is really cheap and even gets you to beaches outside of Lisbon for under 30€, which is great!
Nearby you have supermarkets (we often went to Lidl at Entrecampos), the Museum of Lisbon (with a nice Café), and some nice shops.
Juan was a great host. He gave us great advice on where to go for food and music and always replied very quickly to our messages.
Check-in was very flexible (with late check-in), and also highlight that we got a free late check-out.
Only one inconvenience is the construction work that was right next to the apartment (like literally the building next to the apartment). Not that bad if you're an early bird, but for everyone who likes to sleep in, I would probably chose something different.
We didn't mind too much, as we spent the days mostly outside and also note that there is no work during midday and on weekends!