Kass' place is perfect for visiting Paris. It's just in the heart of Le Marais, you can find the best falafel places right outside the door! The metro St. Paul is 2 mins walk and brings you all across the city, to the Louvre and Champs Elysées.
The place is cosy, clean and well organised. If you feel like cooking you have everything you need in the kitchen! Compared to other studios I've seen in the Marais, this place is much more confortable and you won't find any bad surprise.
Next time I will be in Paris, I'll come back here for sure!