Note that some of the people in the testimonial videos look like they are in their 50s and 60s. If they really thought this would be ineffective beyond a certain age I think they'd be actively turning people away on that basis rather than highlighting success stories with older people.
That being said, I think some sort of mental prep would help with this device because based on my understanding of neuroplacicity, it's a form of learning. You know how if you are in a classroom setting that if you are physically writing down notes, just the process of listening and translating that to hand motion actually makes the brain commit things to memory better. It seems to make no sense but it just
works. Same deal with using
music. So my theory is that the circumstances surrounding the treatment sessions, the environment, the emotional state, fatigue, etc... all play a factor in effectiveness and could explain some of the variability. I was thinking of starting a topic on this but it's probably better left to when we have a lot of members actively using the device and looking to brain-hack for better results.