I travel on international flights at least once a month. Once, when I was preparing to get off my airplane upon arrival, I happened to find a small pouch in a mirror installed in the overhead bin that had slipped out of another passenger’s bag. So, I let her know she had left it behind. Even men who are taller than average find it difficult to check the back of overhead bins, so women must find it even more difficult. I believe this kind of mirror is very helpful to all passengers.