Perfect place. the 19th district is beautiful. Next to us was an awesome park where we chilled after long plane road. Apartment is next to Metro 5. The station is like 2 steps away. Also next door is very cute supermarket which gave us nice supply of food and wine:) Also nice thing that it's only 40-50 min to CDG airport. (Which is very close in comparison) 20-30 min on Metro to all attractions.
The apartment itself is very cute and has everything you need. Very comfortable bed and couch in the common area. Perfectly fit for 4 people. Kitchen has everything you need to each at home (which is not bad for Paris. 'cause it's super expansive).
What was very cool to have is a peace and quiet after long day on foot. You close your door and hear nothing from the out side.
Shower and toilet are separate spaces, which is good, if you are traveling in group 3+
If anything is missing, you can address and the answer would be received within minutes. Rea and Sebastian are very nice people.
What to say? If you have a chance to live in this apartment - that would be a lucky pick. Great value for this money.