My sons (ages 9 and 11) and I stayed at Lana's place for five nights, and it was perfect for us. We ended up sleeping sideways on the loft bed (although one of us certainly could have slept on the cute pull-out). Even in the Paris heatwave, weren't too hot thanks to the fan provided.
The flat is tiny, but everything in it is good quality and well thought-out. I most appreciated that the flat was quiet at night, and the building felt very safe. Also, the Nespresso machine came with three capsules for the first morning, and there were plenty of supplies in the flat (organic shampoo and body wash, paper towels, etc.). Lana was easy to communicate with, and key pick-up was no problem at all.
The flat is in a great location, in between two very happening parts of town, and walking distance to everything near the river. I would stay here again in a minute. Thank you, Lana!