We had a wonderful time in this tiny but very very cosy studio in the heart of Marais. Be aware of the fact that this place is very small but it's perfectly fine for two people and contains everything you need. It's stylish and cosy and the location is just perfect. We barely used the metro because most of the highlights of Paris can be found within walking distance. Marais is a very nice area with lots of shops Cafés and bars around.
Last but not least the host Jean-Michel is very kind and welcoming and will help you with everything you need.
Higly recommended!