The location is really fantastic and Matti's communication was always excellently quick and uncomplicated. Yet again in my opinion the apartment is merely okay in terms of value-for-money for people who are staying in Lisboa for a longer trip over several months. That's mainly because of the amenities (especially the dishwasher, also washing machine, other amenities in the kitchen) and the fact that guests need to organize internet themselves (it's quickly done at a local vodafone store and reimbursed as well - but still it's an effort to be aware of).
Anyways, I had a good time in Matti's apartment and can recommend it overall!