The wafers worked fine for me (my wife called them "nasty biscuits), but the calorie count was higher than I liked. I tried the capsules, but in my body they didn't mix sufficiently with the stool, so I switched to the powder, which I've successfully used for several years, and is slightly lower calorie than the wafers. I don't care for artificial sweeteners, but that's an option with the powder. Others here are happy with the capsules.