This is the perfect central location for Paris! It is in a great area (full of cafes, shops, etc), right next to the Metro, and a close walk to many major sites! It really has a great neighborhood feel and I always felt safe. The apartment is clean, comfortable, and a great size for its value. It is up a few flights of stairs; not difficult, just be prepared for it :)
I would highly recommend it and will definitely consider it again when I return to Paris!