The apartment is amazing. The pictures don't do it justice. It's in a great area, close enough to walk to many tourist hotspots to the south or Montmarte to the north. It has metro stations within a few minutes on 3 lines and multiple buses run outside. The area itself is full of bars, bistros, restaurants and shops. Three supermarkets within 2 minutes of leaving the front door.
The apartment itself is spacious and has absolutely everything one could need. Great oven and hob. All the kitchen equipment and fridge-freezer plus a dishwasher and washing machine. The mezzanine level is great, the bed queen size and very comfortable with lots of pillows. You can put automated shutters down at night for security and to shut out the light. There's also an ironing board, iron, drying rack, ample wardrobe space and more.
We liked the space so much we extended out stay to three months from one after the first week. It was perfect for us as a long term stay.
There are only two things that one would need to be aware of (but we're not problems for ourselves) are the stairs up to the mezzanine are tight and the apartment is on the top floor (5th French) so a quite a climb and there is no lift. We are fine with this having lived in Parisian buildings before and this is typical of Paris. Being in our twenties it doesn't bother us but for those approaching or in old age I would say you need to be aware of this climb.
5 stars!