A really terrific small apartment in a very convenient and interesting location. Good for a family of three or four (if the kids are OK with sleeping on bunk beds) or for a couple. Rue St. Denis, the street that runs past the apartment, is filled with great restaurants, gourmet stores, cafes, bakeries, wine stores—basically everything you need is a few steps away. Situated between the 2nd and 10th, you're within walking distance of the Louvre, Sainte-Chappelle, Notre Dame, and the Marais—it really doesn't get any better.
Guests should know that this is a four-floor walk-up apartment (four flights of stairs), so come prepared to carry your bags that distance. There is a lot of street noise with the windows open. This is a busy urban area that has everything you might expect: unhoused people, pickpockets, sirens, trash here and there. We are New Yorkers and didn't feel unsafe at all, but people not used to cities might feel a little intimidated at first. It's totally fine. Just use common sense and watch your valuables when you're on the street or in the Metro. The apartment itself is completely safe.