i use repticarpet. it looks good, feels good, tastes good...no, no i'm kidding. i like it because it is durable, super easy to clean, and i don't have to worry about buying more substrate when it gets soiled. i have two pieces, so while one is getting cleaned i put in the extra piece. occasionally nellie will leave me some urates and i KNOW that she is going to leave me some feces within a day or two and so i will just put down paper towels until she finishes her business. she has a habit of leaving me presents two days in a row instead of all at the same time, so if i think that is going to be the case then i spring for the roll of bounty. humidity isn't an issue for me at all either, so i don't require a substrate that holds it in, and i can pretty much achieve a good high level during shed times just by misting.