I gutload the one's I'm going to feed off the next day with this as well (not the whole colony, due to my stinginess lol) and dust them occasionally, perhaps a day or two out of the week. I can tell you my day gecko races for the dusted insects, she probably loves how they smell. And the chameleons do as well, they also gobble them right up!
Now that I've inherited a snake I'll probably start injecting a bit into her thawed mice, it can't hurt since she's had sort of less-than-ideal first few years.