The area is safe. You can find whatever (seriously !!!) you are looking for in 500 meter distance ! Public transportation (metro station + Châtelet - Les Halles) are close and safe.
Wi-Fi performance in the house is very good.
In the area, Cafe and restaurant quality is well enough.
From the Charles de Gaulle airport to house is approx 35 € if you use Uber Pool. (this will give you a chance to save 10-15 € vs. taxi fee)