Guillaume place has a good location , 17th are, near by Rome, Brochant, La Fourche metro stations. Plan to spend 20-25 min to get in to the major attractions by metro. Neighborhood Batignolles is a wonderful residential place, it is safe, no issues to walk around at night. Beautiful local cathedral. Multiple stores including grocery stores. Two gyms. Nice park in the area. Guillaume home is classic French single bedroom Appartment, you will share common areas. You will get a single room with very comfortable bed, beautiful window, working table. Guillaume has a couch in a living are where he will be resting at night. Considering how small place is Guillaume is very respectful to the guests and gives you privacy as much as he can. He is very helpful and accommodating in any way you may need help.
Wi-Fi works great! Great shower! A lot of amenities in the bathroom- ladies - feel free behind hair dryer/ hair iron/ cruller - he has it all. Washing mashing, dishwasher, coffee maker, kettle to boil water. Kitchen with all kind of utensils, plate, pans ecc.
Enjoy your stay in Paris! And if you need anything Guillaume will definitely give you his best advice and help any way he can.