his hydro sucks.Nothing at all like american hydro.I threw my back out last year and tried his chit out.No relief whatsoever.Luckily for me FedEx pulled in with my hydro refill.I always use American hydro but ordered G-man hydro as a backup. Big Mistake.Took 2 american hydro and was in dreamland(painfree).300 buck mistake. When I e-mailed him he said his hydro is made in argentina for use in argentinian hospitals.Hope I never end up in an argentinian hospital.Never again.His chit gave me stomach cramps too.It did give me a warm tingling effect in the back of my neck like hydro but did not help my back pain like americian hydro.Little tiny white pill with no marking execpt scored mark in middle.