I haven't tried that one, but I have used other pellet foods for my dragon. They're a good way of adding variety to your dragon's diet, although they don't replace either live food or fresh greens. I soak them in water so that they're soft and sprinkle them over my dragon's salad like dragon croutons
I have beardie pellets that I do the same thing with. My baby wouldn't touch them, still won't.. not matter what I try. Eh, the crickets love them. They even carry them all around the cricket tank.
I use a different kind of pellet Rep-Cal® Bearded Dragon Food for juvi dragons. I give them a dish-full every day and sprinkle it w/calcium. They both love it, and it is the easiest way for them to get enough calcium. I feed them Phoenix and Superworms along with salad and veggies as their actual diet. The "cereal" is just a way we get them to eat their calcium, and they like it. I would never substitute the pellets w/live food, or greens.