This was my first time in Paris and my wife's fourth time. She knew from her previous trips that location is incredibly important when picking out an apartment and Kristin's apartment is in about as good a location as you could ask for. In the lovely 11th Arrondissement, the location of this apartment is close enough to all the major sights of Paris, but far enough to feel like you are getting a real Parisian experience. There are plenty of fine restaurants, cafes, bars, and shops nearby, and Kristin provides a nice guide to them. You are also a short bus ride from pretty much any major tourist attraction in Paris, but you are far enough away from them that this neighborhood does not feel at all "touristy." We would compare the area to Silver Lake/Los Feliz in LA or Williamsburg/Green Point in NYC. We were there during the strike and still had no trouble getting around on public transportation (so long as buses/trains were running).
As for the apartment itself, it is a nice size for a Parisian one-bedroom. If you've never lived in a city like Paris or New York, you might find it a tad cozy, but as two ex-New Yorkers, my wife and I appreciated that there is ample sitting space, a nice size bed, a kitchen with everything you need, a strong shower, a washing machine, and bathroom in a separate room from the toilet. The heat works very well, which was essential for us chilly Californians.
A small word of caution for those who may have limited mobility. This is a bit of a walkup. No problem for us city dwellers, but maybe not perfect for every Air BnB user. The building is historic and has a lovely look, but that does mean climbing a few narrow stairs.
Kristin is an extremely communicative and kind host. She kept in touch as needed and even left us a bottle of prosecco for when we arrived and left two tickets for a cruise on the Seine.
In short, this is a great city apartment as a launching point for exploring Paris. We had a lovely time and would consider staying here again the next time we return to France.