I really enjoy this movie. The aspect ratio fits the story perfectly, I started losing interest in the movie until the 'ghosting' started (around 10 minutes in) and at the end I appreciated the into. It's hard to describe the movie without writing spoilers.
Someone with a short attention span might not enjoy ”A Ghost Story” but I still think anyone and everyone should watch this. If you decide to watch this movie try and watch it in silence, if you plan on watching it with friend(s) or family try to keep the group small.