Wow... I rented many apartments all over Europe but this one is by far the best. The location is amazing! Notre Dame is literally around the corner. Train from airport gets to the nearest subway station. As the train to Versailles... Pantheon is in walking distance, as is Louvre if you're not lazy :) The street is full of restaurants (though I do not recommend them, go further... best is on Cite, as these are tourist traps). Luxembourg gardens are in walking distance (there's M&S Foods close by, very recommended to shop there, it's the best option).
Apartment is very spacious: one bedroom for two, upstairs nook that can be for two and another room with fold out sofa, for one. PLUS living room, kitchen, bathroom, and toilet.
Christian took care of everything you might need... Seriously, you have everything in the apartment. Kitchen is fully equipped and I mean everything! You can make cake there if you want... You have washing machine and dryer (!!!), two hours and you have clean dry clothes. You have dishwasher, iron...
It is relatively quite, as the apartment is inside and doesn't have view of the street... But there's no view at all. But why would you sit inside anyway?
It is very clean, has Parisian feel and has its character. I loved staying in this apartment.