I hold keys for quite a few of my neighbours. I wouldn't have thought a key safe on the outside of the building was a good idea at all. We all lock ourselves out from time to time but even a keyholder a number of miles away is better than a vunerable key safe easily identified with the building. Possibly better under a plant pot or bin or in the wheel arch of a car etc. Really just needs your GF to be a bit more careful too.
I hold keys for quite a few of my neighbours. I wouldn't have thought a key safe on the outside of the building was a good idea at all. We all lock ourselves out from time to time but even a keyholder a number of miles away is better than a vunerable key safe easily identified with the building. Possibly better under a plant pot or bin or in the wheel arch of a car etc. Really just needs your GF to be a bit more careful too.