Justin's place is adorable and people were accurate in highlighting the location. Wonderfully convenient and lots of very good restaurants within a few blocks. The place is small but cute (cozy!!) but really, we were there mostly to sleep and have coffee in the am. It is equipped with everything you need and there are good markets within a few blocks where you can purchase coffee pods, fruit, cheese, bread etc.
As stated, the ceilings in the loft are low. My husband is 5'7" and his head grazed the beams but we got used to ducking at appropriate times. Everything was sparkling clean and the shower in the bathroom had great water pressure and plenty of hot water.
Justin was very accommodating and communicative. We checked on us every few days to make sure our needs were being met (they were).
I would definitely stay there again if I return to Paris for a week or two. I think if I were going to stay longer than that, I would want a larger place.
One suggestion... walk backwards when going down the loft steps . They are very steep and more narrow than we are used to. Once I learned that trick, the visit was perfect.