Stayed at Mathilde's place for two nights with our two sons to celebrate a big birthday. The location is great - easy to get to and walking distance to many tourist sights. There is a strict 'no noise at night' requirement to stay there which did not bother us and the bonus was that the place was quiet as quiet can be overnight and well into the morning. Having the showers downstairs was no problem, with the benefit of two separate shower rooms so we could shower in parallel. Everything was clean and tidy and although it's not luxurious, it was perfectly adequate for a few nights stay. We would unhesitatingly stay there again if and when we return to Paris.