Our family of 3 (married couple and 12 yr old daughter) stayed for 6 nights. Valerie had arranged a car from the airport for us which was great because we ended up missing our original flight due to plane delays and it took us much longer to arrive in Paris. Having a driver waiting for us after traveling for so long and on no sleep was perfect. Valerie was also very responsive with our changes in travel and was able to check us in much later than expected with no trouble.
The apartment is a good size, clean, modern and has 2 bathrooms which was really nice. The heaters worked well. There are also several windows that can be opened. It is an excellent location- it is next to everything but on a quiet street. We heard no street noise in the bedroom. The Louvre, Orsay and Notre Dame are all about a 10 minute walk. The metro stop is a couple blocks away. There are plenty of food options close by including grocery, bakery, wine stores. We often picked up food and took it back to the apartment. We felt very safe at all times.
The apartment really had everything we needed. I agree with other reviews that a new mattress is needed and some new pillows but besides that everything else was great.