Healy also has something called a MagHealy which uses magnetic waves instead of electricity. I haven't tried the MagHealy.
This stuff isn't cheap, but it's an avocation of mine to investigate things that seem "too good to be true" and figure out whether they are. There's lots of evidence that electrical frequencies work. Healy even has FDA approval for use in (drug-free) pain mitigation.
I'd love to try a BEMER PEMF mat, but they're close to $5K. LifeProFitness (whom I trust) is coming out with a PEMF/infrared mat for around $500.