Yeah there isnt much info on it, however I found a lot of people end up with AF from anti depressant/benzo withdrawals (they just dont know it because they refuse to acknowledge AF exists - its awful seeing all these people wondering whats wrong with them) and this is where i found the most info on people using the tuner...survivingantidepressants.org i think it was? and longevity...might be worth looking around if you need more info.
I tried to cross post this onto the NB forum, but it didnt come up in the other forum options unfortunately
If you do get one, stick with it. The big change came for me at the tail end of week 3! Hope it helps dude