Kevin's appartment is located exactly in the heart of 11eme arrondissement which is near to all major locations in Paris. Metro is just next door so you can easily travel to anywhere in Paris.
The appartment was very clean and had all basic amenities. I would say it was much better than what you see in the pictures. It has a really big terrasse with beautiful plants all around which is rare to get in Paris. Le Marais, chatelet is 20 mins walking distance. The famous street of oberkampf is 4 mins walking distance and have many bars and restaurants. Supermarket is just next to the appartment.
I was welcomed by Kevin's father who was really kind and showed me the appartment. Overall, I had lovely stay and would highly recommend this appartment for your upcoming visit in Paris.