After trying Herptopia for about a month, I like it a lot. Spot cleaning is very easy, and liquids do not spread very far.
The only downside is that it wicks up liquid so well, my ball python started peeing in his hide instead of the cool side of his tub. He used to sit on top of his hide waiting for cleaning anytime he wet the substrate; but now I guess it doesn't feel damp to him anymore, so he couldn't be bothered to take it outside.