Claire was awesome, we text her and she replied immediately every time, we even had a flight change from 6am to 11am and I text Claire at 5am to reschedule the taxi which she did - no dramas. The apartment was amazing - as it is in the pictures. Nice and clean and quiet at night to sleep. There was oils and spices and toilet paper left there which was a bonus! Apartment has a great easy to use coffee machine!
To get to the spa you need to go through the master bedroom.
Taxis - if you order a Taxi from Claire they start charging from when she calls them so we had 2 taxis one was already 7 Euro when we got in and another was 12 Euro so maybe just be careful with that but is definitely worth it if you need a taxi for the airport. 3 flights of stairs were no issue - it was good daily exercise :) Would def recommend. Claire stays downstairs in a separate apartment and is not in this apartment. The apartment isn't really near anything - probs 20-30mins drive/train/taxi away from Eiffel and Louvre and we couldn't find many nice places to eat around? Book dinner at the Eiffel Tower a couple of days early - great way to see it.