We had a great experience living in Joao's apartment in the central part of Lisbon.
The place is just outstanding, very authentic and relaxing. You will need that for sure after running up and down the hills of Lisbon :)
Flat is very well equipped, it is clean, comfortable, with the high speed Internet.
Joao is an incredible young man. He was very kind to answer plenty of questions that we had before the journey. And when we finally arrived there was a bottle of white wine prepared for us in the fridge - what a nice surprise after hanging around in the airports and planes thorough the whole day :)
Besides Joao helped a lot by lifting us to the car rental office on a checkout day.
I would highly recommend staying at Joao's place - you will discover one of the most gorgeuos cities in Western Europe and feel kindness of the locals. Again, outstanding!!!

Thank you, Joao very very much!