I have 2 leopard geckos. I use eco earth over a sand mat as a substrate. I love it and so do the geckos. They will dig if given the opportunity, and I love that they have the enrichment. I am able to thin our the layer of eco earth under the hot hide to provide adequate belly heat. For a baby I would recommend paper, but a juvenile or adult benefits from the correct loose substrate. I do feed in a bowl just in case. They typically use one spot as a toilet so it is easy to spot clean.