Louise and Leo's place was ideally located near the Champs Elysees. We were able to walk to shopping on the Champs Elysees, the Arc de Triomphe, Louvre, Orangery, Orsay, Napolean's tomb, and Grand and Petit Palaces. It was extremely clean and stylishly designed and decorated. They have done well with a small space.
It was a bit tight with our family of 5 once the beds were out and luggage open, but we were gone all day and only there to sleep, so it served us well. We had two sleep in the bed in the loft (a double futon mattress), 2 on the hide a bed (which is the most comfortable hide a bed I have slept in), and 1 on the air mattress on the floor. The neighbors upstairs were noisy at times, but we slept with ear plugs and were not bothered. They may have been renters as we heard people coming down with suitcases one morning.
Make sure to bring shampoo, conditioner, hand soap and washcloths as they were not provided. If using the air mattress check the kitchen cupboards for the battery pump as we did not find it until we had already used the foot pump to inflate.
Overall this is a great value for the location and nice apartment that it is. I would highly recommend (especially for 4 or less people).