Dan,
My brother and his wife have had one (or a device like it) for several years. They swear by it. My sis-in-law wore it after a surgery because she felt like it quelled the nausea from the drugs. My nephew has always gotten car sick and he wears it when they travel. Once again, swears that it works. I haven't tried it, but I have put it on. The "pulse" feels a little strange at first, like static electricity, I suppose, but then I forgot that I was wearing it. We may take it with us on the next trip down to see if it works. DH thinks it's all a mind game. (He's a pretty classic skeptic.) But I suppose that if your mind thinks it works, it probably will.
Julie