The apartment is located perfectly in Lisbon! It's really nice and cozy :) Even the couch I slept on was comfy! The check in went smoothly, Rui & Elsa sent enough information beforehand to explain everything. They also had good restaurant recommendations! There's absolutely nothing I could complain about :)
The only thing I would recommend is to take earplugs, cause the walls are thin and you hear the cars and people on the street, but I'm pretty sure that's the case in every apartment in Lisbon since the buildings are different to those we are used to in Germany for example :)
Thanks again, it was lovely!