As in freeze-dried crickets? From what I hear, not all beardies will eat it. Also, during the freezing-drying process, they loose some of their nutritional value. If your beardie eats it, great, but also provide salad and live food. Freeze-dried items are a good thing to have on hand in case of a snow/wind store, tornado, hurricane, earthquake, or anything else that might crash the power lines. Or just in case your pet store is out of live food or something, you always have a backup.
When I got some food pellets (for gutloading crix), I found one package had a "free trial" can of freeze-dried crickets. Next time you go to your local pet store (something I try to avoid), check and see; you might get a free can!