Simon’s flat offers a nice interior as well as all the equipment you need for a nice stay and the location of the apartment is close to the Copacabana.
Anyway, be aware that the apartment is located on hill up in a fevela that you can only reach by an exhausting walk or by an elevator which is strongly occupied. During my stay there was also very loud music playing from a bar in front of the apartement, but maybe my timing was just unlucky.
If you have an open and adventurous mind, I would totally recommend staying with Simon!