I feed almost exclusively ASFs because I have a large colony of them. However, even my BPs will take a Mouse or a Rat just as quick. I had a strict mouser that got converted over to Rats because of ASFs. So far, no "stuck" problems, where the snakes will only eat one species.
As a feeder, I love to keep them compared to mice and rats. They are easier to clean up after, do not smell nearly as much, breed prolifically, and will eat anything and convert it into large, happy babies. They've never gotten diseases I have seen in mice or rats, such as wet tail, tumors, herpes, or one of the variety of skin flaking diseases. I attribute this to their relatively recent introduction to captivity.
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25 year old 0.1 from Lincoln, NE
Ball Pythons - 0.1 Pastel, 1.0 Pastel het Pied, 0.1 Pied, 0.1 Cinn, 1.0 Black Pewter, 1.0 Woma (hidden gene?), 0.1 Yellowbelly, 2.1 Normals
Kingsnakes - 1.0 L. m. thayeri, 0.1 L. m. thayeri X L. alterna, 1.0 L. g. californiae
Other - 0.1 Whitesided P. catenifer sayi, 1.0 H. nascicus, ?.? Chrysemys picta, 0.1 crazy cat, 1.0 husband