Hoping that I can help future guests:
The sleeping sofa cannot be used as a sleeping place!!! A part of it is wooden. The host or Airbnb should remove the sofa as a sleeping option. We got a refund because it is not acceptable.
Regarding the rest of the apartement: It is located in a really good position in old Lisbon.
The building is old and the stairwell is a bit dusty. The apartment itself has its charme and is nicely decorated. But the bathroom and the kitchen are old - depends on your taste if you can accept it (I personally would not use the kitchen). The apartment is cozy but small, the bedroom and the bathroom have no windows. The cleaning standard could be improved (we found some hair in the bathroom).
For your information 2nd right means 2nd floor right door - for us it was not easy to understand at the beginning. There should be also given some instructions regarding the app you have to use to enter. Unfortunately after the check-in the communication with the host was almost not existing. We contacted him because of the sofa problem and did not get an answer until we contacted Airbnb and asked for a refund.
My suggestion: if you just use the apartment for sleeping (the bed not the sofa!) it is ok because the position is very convenient.