We had a very nice but short stay at Duarte e Joana's apartment. It is very clean and well located in the center of Lisbon in a neighbourhood with locals, we could walk to almost all important places.
We only met Duarte and he was very friendly and gave us lots of helpful tips about Lisbon, also the communication in advance was super.
I recommend this apartment 100% and will choose this apartment again when coming back to beautiful Lisbon!