This apartment is a perfect base for someone who wants to explore Paris. Its location couldn't be better: in the very city's heart, walkable to almost anything, in a district packed with cafes and bakeries, but at the same time it's a very quiet street. A train from CDG airport stops just 7 minutes walk from the place. (Pro tip: keep your train ticket as you will need it to get out of station)
The apartment itself is cozy, clean, stylish and has everything that's needed for a comfortable stay of a couple. There is a comfortable bed, large window, hot shower and a controllable heater. Kitchen has enough items to cook some breakfast: a stove, cookware, fridge and of course there's a kettle, a coffee maker and a corkscrew :)
Jean-Yves, the host, is a friendly and helpful person. He gave us advice on how to get around the city, where is the best bakery around. I'm sure he'd help us more if we needed it.
In short, go for it. You won't regret. If (when) we come back to Paris, we will definitely stay here once again.