We stayed at Mathias' apartment ("Soul Lisbon-Alfama") for a month. The apartment was nice and clean, just like the pictures. And it's convenient for walking to many places and catching buses or trains nearby. We really enjoyed it and felt very at home. Mathias is an excellent host - he arranged transportation to and from the airport and even got us a little foldable bed for our baby. He was friendly and helpful and always replied promptly.
I would definitely recommend this apartment to my friends.