I've tried the reptichips...Currently trying an "off brand" version that is cheaper. I like them a lot...haven't had any snakes try to burrow in them yet, but have not had mold issues or negative reactions from the snakes. I just wish they weren't as expensive as they are. I'm not liking the cheaper brand that I'm trying now, but was happy with a different off-brand (prococo).
Great colors in her last photo btw!