We loved our stay at Caroline's place. The space is very cozy and stylish, and we loved having the small kitchen and living space in addition to the bedroom -- it really had everything we needed (including washing machine!), which made it an easy stay. The building seems very secure, with a double-keypad entrance, as well as a lock on the main door. There are several metro stops within 5mins walk from the apartment, as well as many cafes, shops, and restaurants, several of which we enjoyed; the Louvre was about 20mins walk which was quite convenient. Note: we stayed in late June, when it was quite warm in Paris, and the apartment can be quite warm both during the days and at night.