Hello
I stayed in the flat for 3 months for work. Overall it is very conveniently located near the center of Lyon with good transport links. I have seen some concerns in other comments about the area being rough. Indeed this is the reputation Guillotiere has. During my stay I did not feel unsafe but I am also a white male so others may have different experiences.
For the flat itself: it is not as large as the pictures make out to be. The living area/bedroom are quite nice and also clean. However when I arrived I felt that the kitchen area was dirty. There were many dead bugs on the window sill, dirt around the plugs, on the walls around the hobs, grease on top of the tilling (around the kitchen area) and also on the shutter mechanism. I messaged the estate agents with pictures about this around 1 month into my stay (I could not do this earlier due to getting my head around moving to France) and they said that they could do nothing about it due to it being too long into the stay and then ignored the issue.
In addition to this both the kitchen sink and the shutter mechanism for the window broke during my stay. It took them three weeks to fix the kitchen sink and when the shutter mechanism for the large window was fixed it was fixed poorly with a screw that was too long making it awkward to close. This is particularly annoying since you have to close the shutter every night to stop the street lights lighting the room while you sleep.
Overall I felt the location of the flat was good but more care could have been taken by the state agents managing the property to ensure that it was well looked after, clean and provided a good experience to those renting the apartment.
I hope this provides a balanced view of what one could expect renting this property.