The flat exceeded all our expectations! We knew it had great reviews already but it was just such a fantastic place; Great hosts, perfect location and the flat had everything you'd need for your stay. Joao was really nice, he greeted us on the first day and even gave us lots of tips for restaurants/activities. He also arranged our cars to and from the airport so everything was made extremely easy for us.
The only thing I'd say is that if you're a light sleeper, it was (at times) noisy on the streets at night. So maybe take some ear plugs if you struggle with sleep! It didn't bother us though so we were very happy with everything.
I'll definitely be staying here again on future Lisbon trips!