Welcome @ds2400, While we wait for @lindaaa to reply to your question on how the Fisher Wallace device worked for them, I thought I would share this 2016 article with you.

"Does the Fisher Wallace Stimulator really work?
The Fisher Wallace Stimulator been shown effective in many studies including one in the Journal of Affective Disorders. The results of a pilot study for the treatment of bipolar disorder was published last year. Jul 19, 2016"
-- Why I Get My Brain Zapped - Scientific American Blog Network: https://blogs.scientificamerican.com/mind-guest-blog/why-i-get-my-brain-zapped/

Are you thinking about purchasing the device to see if it will help insomnia?