I think Pierre's flat is a good option if you want to stay in a nice location in the center of Paris and not spend too much money. But that also means you can't expect too much from the place. It's a very typical small and old parisian flat I guess, with not the best heating. We had a very chaotic arrival, couldn't get into the apartment building at first, because Pierre sent us the wrong door code, luckily we found someone who knows the building and let us in. Moreover Pierre told us at the day of arrival that his cleaning lady had cancelled last minute and he couldn't find anyone to clean the flat before we arrive. However, I believe things like this can happen and lucky for us the person before us left the place in a relatively good state. (not clean but also not that bad) Nevertheless, we had a nice stay at Pierre's Apartment and didn't let these inconveniences ruin our trip. Definitely recommend this place to young and easygoing travellers. :) Also 10/10 for the Location.