Beardies love em' and leo's not so much! Their excellent, really. My beardie goes crazy for them, he gets them every morning. Their very high in protein, live extremely long and don't need to be fed (they eat the substrate they come in). We order them straight from the phoenix worm website, its much cheaper then buying them from a herp shop (plus most don't sell them!). Occasionally you need to wet their substrate because it gets dry which causes them to stop eating, but only put a tiny amount in. Don't soak it! They only thing I'll say is, don't buy the largest size because their at the end of their life cycle and die pretty quickly and have a wicked raunchy odor. You know their going to die soon because they turn black, so use the black ones up first. Hope that helped!