I didn't get to meet Joao however all of the communication we had over email and airbnb was great. Check in and out went smoothly and he was available to help with any questions.
The apartment itself was just as shown in the pictures. A group of 8 of us stayed and we had a great time exploring the bars and restaurants right out the front door. The only slight downside of the apartment was no fans or air-conditioning and just the one bathroom (this is all mentioned in the description so we did know prior to arrival).
The apartment was nicely furnished with a good size kitchen, we appreciated the dishwasher and the washing machine. All in all it was a great stay and a excellent base for exploring Lisbon.