Just wanted to do a review for those that are looking at renting the flat. Location wise, it is really convenient as it is located about 5 minutes walk away from the metro station Les Halles Chatelet (which has most lines and RER lines) and the Louvre Rivoli station (line 1).
Check in process is great. Pick a flat just sent an email with the code for the box and that was it. Smooth process.
I didnt use the Pick a Flat transport, but I don't think it is neccessary since taxis are a flat rate from the airport 53€. Just make sure you go to the official taxi pick up spot and not those guys asking you if you beed a taxi as you exit the airport tunnel. And for a taxi back to the airport i just used the G7 taxi app to call a taxi. They are good giving me how long, taxi color and make, and license plate of the taxi coming. It is also a flat rate 53€ to airport.
The flat itself was clean for the most part. There was quite a lot of dust on top of the cabinets next to the bed. The flat itself was nice and cool with A/C which we definitely needed during the week we stayed (upper 80's and 90's degree temps). Only issue is the A/C does not reach the loft which is really hot. Really wish th A/C was on the wall with the window. Work around put the fan on top of cabinet to help move some of the cold air into the loft.
Fridge was helpful but not super cold.
There is a Franprix store where you can buy water close by which was nice.
Washing machine was nice unfortunately there is no dryer. I asked multiple times prior to booking and after booking about the dryer and was reasurred it was in the flat to find out when I was going to use it that it was not a combo washer dryer. Contacted Pick a Flat and they just said sorry.....
Another problem, taking out the trash. I was trapped in the basement once the elevator door closed behind me. Hitting the elevator call button did not open the door and all the other doors in the basement are locked. I had to wait for my wife to come find me since I did not have my phone with me.
Overall good experience in Paris, other than being trapped in the basement in the middle of the night and trying to figure a way to dry my clothes.