Right now I'm using NatureBark (I'm guessing it is more or less the same as ReptiBark) but I'm thinking of switching over to aspen when I clean the tank out, probably in a week or so. I know paper towels and/or newspaper is preferred for first time owners, but I really would like something a little more aesthetically pleasing, if you know what I mean. I would think aspen would be easier for spot cleaning, too, than what I'm using now.