I had a pleasant stay at Caroline's place.
The room offers enough space. The house is clean. Bathroom, toilet and kitchen are being shared with Caroline.
Some people (like me) will have some problems showering because there's not much space to stand right up.
I had good communication with Caroline although we had to improvise with languages. We ended up with German most of the time. I think that was fun.
I have the opinion that the neighboorhood is not too exiting, actually a bit quiet in the evening, but the center is never far away with the Paris' metro system.