I have only been using it for a month, but I do like it better then sand it is not dusty and if the Uro's eat it, it is safe.

Only issue I have so far is finding a sifter with holes big enough to fit the millet through it. It is a pain to pick greens and such out of it; I will need to find some type of sifter.

Troy
http://www.uroranch.com/
Link