Location! Location! Location!
The flat is ideally situated for all the major attractions in the central core. Easy access to RER and the Metro but we rarely used them since we could walk to so much. Super easy access to RER for travelling to/from CDG airport. The flat is cosy and cute. As all reviewers notice, the bathroom is very tiny (I.e. narrow) but the shower is nice with lots of hot water. Washer/dryer very efficient. The kitchen is modestly equipped - not really suitable for elaborate cooking but perfectly adequate for breakfasts, and light meals or snacks. Full size fridge with a freezer section was a bonus! The ceilings are low, especially on the stairs, which could be challenging for people over 6 ft/180 cms. Also, the two bedrooms are connected and you have to walk through the room with the bunk beds to get to the room with the double bed. It was fine for me (mom) travelling with my two adult daughters but I think my husband would have felt uncomfortable if he had been with us. Also the floors upstairs are pretty creaky, so it is hard to walk through the one bedroom without waking up the occupants sleeping in it. And there are stairs - two flights up to the flat and one more up to the bedrooms so not suitable for persons with mobility restrictions but easy to access otherwise. The bathroom is down one flight of (narrow) stairs from the bedrooms. All of that having been said, the location is so great and the hosts so receptive and easy to communicate with that I would stay there again and recommend it to others.