My Mother was dying of Cancer. I went to see her and suddenly she was just speaking rubbish and the Doctor said she had had a stroke and her brain was affected, there was no hope. I hated the thought that she would die like this without me being able to speak to her again.
I have to tell you I prayed very hard that night that she would be able to talk to me again. The next morning the phone rang and a voice said "Hello my best girl" it was my Mum and she had recovered all her brain power again. The Doctor was amazed. It was lovely to have the conversation with her I thought I would never have.
She died shortly after, but she was still speaking and thinking as she should have been.
So, it did work for me.