Hello Don @dwb111060 -- Welcome to Connect. I have idiopathic small fiber peripheral neuropathy and have not tried the Rebuilder product but I have tried a Zopec DT 1200 which also purported to help neuropathy but after about 6 weeks of using is 30 minutes twice a day I found no real help. I can say that maybe one or two days my feet felt a little better but that could have been something other than the device. I only have the numbness with my PN so others may have different experiences. I can tell you there a lot of people with neuropathy and a lot of companies selling stuff that may or may not help you so you have to do your own research. Here is an article I found about the device from 2008 on the ScienceBasedMedicine.org website.

Recognizing Dubious Health Devices
-- https://sciencebasedmedicine.org/recognizing-dubious-health-devices/

Here are some other sources for evaluating a treatment or device.

Quazar's guidance about avoiding scams and snake oil cures
-- https://connect.mayoclinic.org/discussion/how-to-avoid-quacks-and-snake-oil-treatments/

FDA's HEALTH FRAUD PAGE
-- https://www.fda.gov/ForConsumers/ProtectYourself/HealthFraud/ucm539101.htm

NIH's National Center for Complementary and Integrative Health (NCCIH) which offers guidance about integrative health and how to evaluate it.
-- https://nccih.nih.gov/health/decisions

John