I stayed there for a week with my partner for the holidays. That was our first Lisbon visit and it was a wonderful stay. I am very thankful to our host Uwe, who went above and beyond in communication, effectively handled our entry into the property, even though we were massively delayed at the airport and came late.
The property is well looked after, clean and well organised. Has all the amenities we needed. Nearby, there are a couple of grocery stores, small restaurants and cafes that are enjoyed by locals, thus allowing easy and well-priced coffee/breakfast/lunch options. Apartment is in a quiet neighbourhood, but is close to Lisbon's many touristic points of interest. Has a bus route with 1 minute walk, within a 5-15 minutes walk - a train/metro station and other bus routes; the iconic E28 tram line; bigger supermarkets, plentiful of various restaurants and smaller shops.
I highly recommend Uwe's apartments to anybody and would give it more stars if I could.