I've stayed at many AirBnB's..some under expectations, many average, and some above average. This was BY FAR the best experience I've ever had, and in many ways a model for the perfect way to host an AirBnB.
The apartment itself is in a great location, such that a lot of great and new restaurants / cafes / stores / squares were within walking distance. It's beautifully decorated, but also very homey and comfortable -- beds were great, lots of space, little details like wine bottle openers / nespresso machine / champagne flutes / iron / international cable / etc all there. Perfect luxury apartment.
Check-in process was phenomenal and actually impacted the Lisbon leg of our trip. Sergio communicated multiple times before we landed to make sure we were aligned on timing, knew where to park, etc. We got to the apartment later than expected on a Friday evening, and he stayed with us for over an hour -- orienting us to the apartment, city (via his guidebook), helping us plan our side-trips, etc. We usually prefer to rely on our own research, but Segio's many many years of living in the city and clear understanding of our interests shown through -- we followed his recommendations for almost our entire itinerary in Lisbon and really enjoyed experiencing the place as "locals".
Check-out was smooth (just leave the keys in the apartment). Sergio checked in with us via Whatsapp during our trip, which was very thoughtful. Couldn't be more appreciative, and will definitely be back.