Nicolas's apartment was a wonderfully clean and comfortable place for our family (me, my wife and two kids) to come back to after a long day of exploring Paris. We were particularly appreciative of things like the microwave and the ice and water dispenser in the refrigerator! We also appreciated the security of the complex, requiring a key fob to enter in multiple locations. Made us feel very secure.
It is located a perfect distance from all of the activity of the heart of Paris, but not so much that what you wanted to see wasn't more than a 1/2 hour metro ride away. The nearest Metro station was only a 5 minute walk. There were cafes, a pharmacy and markets all no more within a 10 minute walk, which is exactly what we needed.
Nicolas was easy to reach and quick to respond when we needed, but we never had any issues at all. We couldn't be happier with our choice of Nicolas's apartment for our vacation. Very highly recommended!