Manuel was a great host and the apartment might be the best deal around. It's got good beds, a well equipped kitchen and a nice and clean bathroom. As it was raining a lot during our stay we were quite comfortable with staying in and enjoying cooking our own dinner, watching pay-tv or using the good wifi connection ;-)
The neighbourhood is one of the best in Lisbon. The apartment is located in a quiet street but still right in the center. Principe Real is max. 5 min by foot - and it's a great place to soak up Lisboa-life with a couple of Bicas or Imperiais. The metro is also 5 min and the famous Bairro Alto is just under 10 min.
All in all we would recommend it to everybody - couples, families, or groups of up to 3 or 4 friends.