Oly and Mat are the perfekt hosts. They were really kind and welcoming. Their apartment is beautiful and could not be better located, Notre Dame are only 5 min to walk and Metro station is directly in front of the house. I can highly recommend to stay with them if you want to visit Paris for a few days. Check In/Out and communication was very easy and they had great recommendations for eating lunch/dinner. I would give more than 5 stars if I could :)