Kate & Olivier's place is a fantastic choice for Paris.
The apartment is large, beautiful, up to date, clean and comfortable. You could tell they care about their surroundings / home and have an eye for design. If you cook the kitchen is set up perfectly. The bathroom is updated with great water pressure, hot water and towel warmer/heater. The bed is comfortable and pillows great too. There's even an office if you want to work from a desk.
The apartment is located close to transit, food, Centre Pompidou, the Seine, etc. There's a small lift perfect for luggage. We wouldn't hesitate to stay at their place again.