Hi Ruud, we are glad that you enjoyed your stay in our place and in Lyon!
However, we'd like to add some info : what you described as a decrepit building is a 16th century building that is maintained jointly with Heritage Architects of Lyon therefore it is not in a bad state, it's only old! Nuns used to live where you slept ;-)
It is also part of the selection of buildings to see in the Lyon city map for its facade with "coursives", I'm not sure that the city would take you to a shady area for a visit...
We lived in the flat for years, we can ensure that the neighbourhood is great. Yes, it can be exceptionnally noisy or some building walls can sometimes have graffitis on them, but you are located in the heart of town: that's the city life in France!
If you are ever back in Lyon, we would be delighted to host you again.
Axelle & Marc