Probably the best documentary on Alzheimer's you will watch. It also makes the perfect companion piece to the music documentary, "Alive Inside" which also highlights the interaction between music and dementia.
I'm only a mild Glen Campbell fan - enjoy about half a dozen or so of his songs. But I have always had a lot of admiration for him as a fellow musician - one of the best. His work as a session musician with the wrecking crew in the 1960s was phenomenal in itself - and it was such a touching moment, that when in this film, they got some of those guys in to record Glen's final song with him.
It doesn't matter if you're a Glen Campbell fan or not, this is a well-made documentary, predominantly about Alzheimer's. The fact Glen was a world famous musician was almost just a footnote to the overall feel of the film. Amazing that the "music part" of his brain was one of the last areas to be affected. Inspiring to see him perform intricate guitar solos when he can't remember lyrics. Heartbreaking to see him have Alzheimer's meltdowns onstage and off.
Rest in peace, Glen. Rest in peace, my Nan.