Protein bars shouldn't taste like candy, IMO. I have a hard time believing there's only 6 grams of sugar in the detour bar.
If you're trying to lose weight, there's no real harm in eating a protein bar as one of your meals/snacks; however, if it's a low carb bar with glycerine, you're basically just eating carb kcalories that do nothing for you. I think you'd be better off eating real food instead of the protein bar. Plus, protein bars - especially ones that taste like detour - can be hard to eat just one at a time.