I had one. If you search for Addy, you'll find pics of her. I never got her switched onto mice, or anything. So I had her for what, nearly two years, assist feeding her the whole time. (She would take a mouse if I held it up to her mouth and pressed gently with it). And she thrived, until she got a mystery abcess near her vent, which despite intensive veterinary attention and treatment at home, never completely healed, although it seemed to be nearly healed when she died, months later, of unknown causes.
She was a sweet little snake, not aggressive at all, an excellent hisser and fakey striker. She started out rattlesnake colored and turned nearly pure black as she matured.
My recommendation would be to buy an established feeder, preferably CB. Good luck finding one...