The things that stood out the most to us were the really good location of the apartment and the exceptionally good care by Carlos, as he always responded within 10-15 minutes and had a big variety of tipps for good restaurants and tipps to make our stay as enjoyable as possible.
The apartment was not as clean as we hoped to but we'll put that on the fact that we could enter the apartment at 11:00 am already which is several hours earlier than usual. We also had a little problem with the water heater not giving consistently enough warm water, but in the end it turned out that happened due to a misconfiguration.
So all in all me and my girlfriend had a really nice time in Lisboa and an enjoyable stay at the apartment.