For someone on chemo, pregnant or with chronic vomiting these can be lifesavers, literally. Even often replacing the need for expensive pharmaceuticals (of course, check with your doctor before taking).
Flavor: shockingly, I am not a fan of ginger, and find these quite palatable. Effect: I often find I can use these in place of Odancetron or Prochlorazine, not always, but certainly more than 50% of the time.
Highly recommend, but shop around, as prices vary depending on supplier.