If you're looking for a place in a cool and safe neighborhood, I would suggest booking Medy's place. The apartment is located in the 11ème arrondissement in Paris and it's easy to get around from there. The neighborhood also has a lot of cool cafes and bistros where you can relax and of course people watch.

Medy is also a really great guy! We had lunch together on my first day in Paris and he was really friendly and helpful. He gave me a tour of the quartier as well as a list of places to visit based on my interests. He also helped me navigate the metro.

The apartment was big enough for 3 people (2 friends and I) and quite comfortable. Although the place wasn't impeccable, it was livable.