I want to know what your pros and cons are? I have used aspen, sanichips, and coconut before. I have been using aspen but my supplier out here sucks. I usually buy 10 boxes at a time because of this fact but still have issues. The sanichips I like for spot cleaning, but hate that they stick to the rats and get in the snakes mouth. If I am correct because its been years since I used coconut, there was alot of dust in it and it molded quick I think. Chime in and give me your 2 cents.