Karl's place was very clean and surprisingly big. There are enough windows to keep the place cool without an air conditioner, though there was a small heat wave when I came and it was a little hot a couple nights. Otherwise it was very cool and comfortable due to Paris weather. There were convenient grocers in the area and plenty of cafe options. I was very comfortable during my long stay at Karl's, though the neighborhood was a little noisy some nights. I don't think it's too much a problem, though. I worked from my computer while staying at Karl's, and the Wi-fi was in good working condition. Karl was very communicative and friendly.