The view from the apartement and the location are the key reasons on why to choose this accommodation. I also wanted to experience living in an older Paris building during my trip, and that's what I got to do. :)
If you are looking for comfort and lots of amenities, it's not the ideal place for you, e.g. little shower room/cabin (not a bathroom) on the upper floor. But if you're chill about all that, love the realness of an older house, you will be totally fine and you will get to watch the Eiffel every night for as long as you wish! :)