Perfect location, next to the main streets in the Marais, for pubs or shopping. Another pro is that Emma is very fast in answering the mails.
The main problem about this studio is related to the shower/toilet. The shower drain doesn't work properly and there is not a lot of hot water, so you have to use very little water to make it last and to avoid it overflowing into the room. The toilet is located outside the studio, next door, and it's kind of old. Another problem is that there is only one sink, so you have to use it for everything: cooking, brushing your teeth, washing your hands etc.
I would recomend this studio if you're staying for 4 days at the most, otherwise it would get unconfortable.