I have tried the two flavors they currently have - Vanilla Almond Crunch and Peanut Butter Supreme (they soon will have more flavors available). They are both chewy, with a background flavor similar to a mild caramel. They are mainly sweetened with inulin made from chicory root, with small amounts of Lo Han Guo (a fruit extract) and sucralose. The total non-fiber carb count is just 4 for the Vanilla Almond Crunch and 5 for the Peanut Butter Supreme. They also have 20 grams of protein. Eating a whole one does not raise my blood sugar at all, and I'm told that they have done lots of blood sugar testing on the bars.
And it gets better - as a trial offer, the company will send out two free Quest Bars to you - one of each flavor. Of course, we've eaten both of our free ones. Earlier today my husband asked, "so, have you ordered any of those bars yet?" It's very seldom that both of us are enthusiastic about a new low-carb product, but Quest Bars are the exception. (I'll be writing a full review of the bars before too long, with more details.)
Image Courtesy of Quest Nutrition