Yes, if you're looking for suggestions on other alternative feeders, I would agree with FBradshaw there with the use of ReptiWorms or Phoenix Worms. Just a minor note, but CalciWorms cannot be used as staple feeders. Although they are the same type of fly larvae, they are fed a significantly different diet, and therefore, have extremely high calcium to phosphorous ratios, higher than the recommended amount. Therefore, although they can be used safely as an occasional supplement or treat, you should not use them as a staple, which is even mentioned on their website.
I specifically mention this because I know that a few big chain pet stores do carry CalciWorms, while ReptiWorms and Phoenix Worms are only rarely found in small, local pet stores, and is usually ordered online. Because of the accessibility of CalciWorms, I figured I would include a note of warning.
Otherwise, superworms are fine as staples, as are ReptiWorms and Phoenix Worms.