This is such a lovely place and you feel really like a student in Paris. And while this is great it might not be ideal for everyone as it is super tiny. Having said that, you don't stay in Paris in your apartment, you explore the city. The stairway can be a bit of a challenge- you are not able to carry two pieces of luggage up or down at the same time but nothing that can't be managed of course.
The distance to the Mouline Rouge, Sacre Couer, the Opera and even the Louvre are awesome (if you like to walk a bit, otherwise there are bus and metro stations everywhere). So be aware that this place is tiny, that you feel maybe like a student when staying there but the neighborhood has everything that you can ask for and it will give you for sure a true Paris experience.