I might tinker with some of this at some point, but my results may vary as I am not neurotypical and every indication seems to suggest that what is actually happening in these is inducing a mild autistic like hyperfocus or in some ways a hypnotic style focus.
I'm also warry because I've known more than a few people who bought into quack science about introducing magic electricity in the same way that snake oil sales people looked for. Look up the Zapper. You'll see all these people talking about improving the immune system and resolving sickness and disease via running current through their body. A lot of people have bought into this sort of thing, and they enthusiastically want others to discover the wonders of this. There is so much techno babble that from the tech side makes sense but relies of uneducated thought processes with regards to immunology and medical science. http://www.quackwatc...ncer/clark.html
And while Transcranial is not the same thing and has been used and tested for legitimate effects by legitimate scientists in the feilds to which they are applied, I still have a very strong suspiscion of magical energy treatments and such. I do think as a retraining tool it could be potentially useful as it could help retrain pathways, much like having somebody guide you through an action until you've experienced it enough that you can instinctively do it. But it would depend of wether or not the effects of the device are infact neurological or in part psychological.
I also have to wonder about the idea that if it's able to change brain function I would expect there to be more risk and potential long term changes. If for instance it pumps up the brains natural supply of opiates does that mean with chronic use the natural opiates trigger system will register higher levels and start to amp down natural release, forcing a dependance? Does this apply to other things as well? Could you actually cause neurological decline by over stimulation and then desensatizing and dependance? If that can't happen then it increases my suspicion that it has little real lasting effect on the brain.
But in the end I just don't know enough.
Live content within small means. Seek elegance rather than luxury, Grace over fashion and wealth over riches.
Listen to clouds and mountains, children and sages. Act bravely, think boldly.
Await occasions, never make haste. Find wonder and awe, by experiencing the everyday.