Perfect location to explore Paris. Bus stop and metros are close enough, the Marais district itself is wonderful, full of life. Several fantastic boulangeries around. Grocery store and a bio store literally behind the house.
Apartment is quiet and sunny. It situates on the 5th floor (beautiful old house without an elevator), so if you have some health problems it might be an issue. But we loved it - free gym!
Correspondence with the owner was smooth and cool.