Some people don't like mealworms because they claim that they have too much chitin (exoskeleton/shell), and that they will give a reptile impaction if used. Like most information on impaction, this is a myth. Mealworms do have a low meat-to-shell ratio compared to some other feeders, and that makes them harder to digest. However, healthy reptiles are perfectly capable of digesting them. Make sure you have correct husbandry in terms of basking temperatures, UVB lighting, hydration, and other factors to minimize your pet's risk of impaction and other illnesses.