Amazing place, old building but very safe and no negative experiences for my 3 night stay at the place. The access to the room is guarded by three safety factors (the code-locked doors on the street, the code-locked doors into the building, and the lockbox for the keys to the room), which only you (and the residents of the building, which I honestly rarely meet) have. No criminals at sight and everything went well. Definitely going here again for my next Paris trip!