I'm in the south right on top of the supply and it'd be too expensive for me to use for more than a couple snakes. I just use it for my one BP.
Tried using it in an area of my turtle's cage for awhile to give her some new textures, but she would eat huge chunks of it, so that stopped pretty quickly. Turns out she had hidden some infertile eggs under her substrate so I didn't know to boost her calcium and she was trying to replenish it, but it scared me so bad I'm never putting it in her enclosure again!