The apartment is in a nice and safe neighborhood, only a 5 minutes walk from the train station. It looks just as in the pictures and is very bright. The bed is comfortable and the bathroom is big enough - and after the shower curtain was changed to one actually matching the hight of the walk-in shower there were no floodings of the bathroom any more. WiFi is a bit slow, but still sufficient for "the usual stuff".
The only downside was the lack of communication before my stay, but this improved greatly right before and during my time in Lisbon. Also more than 2 towels (1 small, 1 big) for a 8-day stay would have been appreciated.
Make sure to bring ear plugs as the garbage pickup happens twice daily - around midnight in front of the apartment and around 6 am in the road behind the apartment. Also take good care on the steps as these are very steep and rather slippery when wet.
The fado house O Corrido next door is amazing (both food and music) and dinner at A Parreirinha do Paraíso just around the corner was lovely, too. Overall, this was a pleasant stay!