My husband and I did a "babymoon" to Lisbon. We had a very wonderful stay with Alex and Carolina.
We planned a lot ahead of the trip (general itinerary for each day, restaurants to go to, etc.) and emailed a bunch back and forth with our hosts on their recommendations. They always responded right away and gave the best tips. This was hugely helpful. It would have been tough to navigate all of this without their help.
The apartment itself is very centrally located (near anything you'd want to see), clean, and comfortable. It is on the 3rd floor which didn't bother us at all, but be mindful of that when booking.
Carolina was at the place right after we reached from the airport. We appreciated her tips to pay 15 euro or less for the taxi! She gave us a tour and rundown of the apartment and area. She texted us (whatsapp) during our stay, just to see if we needed anything. And lastly, called us a taxi for pickup on the way back to the airport!
We would highly recommend staying here, not only because of the lovely apartment, but even moreso for the wonderful hospitable hosts, Alex and Carolina!