Well tried this tonight and took it off already. Could not get it to work at all. My GF wanted a free countdown app. As I had already got it, it did the family sharing thing on her phone and all she gets is this message
It is all set up correctly, I'm the lead account, but this was just so frustrating we have taken it off now.

It is all set up correctly, I'm the lead account, but this was just so frustrating we have taken it off now.