I had a lovely 6 days in Marie's appartment. Located very centrally in Lyon (close to métro Hôtel de Ville and several bus lines), but very quiet. The appartment is on the fourth floor, so you need to do some climbing. The rooms are very comfortable and cosy. Good bed and very practical kitchen with lovely cutlery and a nice bathroom with comfortable bath/shower. The neighbourhood is nice, full with small individual shops. Although you must keep in mind when you are going to Lyon in August, a lot of shops are closed for summer holidays.
Marie and I have not met in person, but we had very frequent and adequate contact by email, which was very pleasant. Sarah, the student who welcomes you, is great! So if you ever go to Lyon for Holidays or business: stay at Marie's place! I can recommend it.