I don't know cause from what I know Optimum Nutrition makes it. Surely overpriced though. Try SNDnutrition for good selection of creatine that's affordable.
I also vote for Pure CEE from www.anafit.com. You currently have to call them to order this product (you can't buy it from their web site because of shipping reasons).
I used to use the creatine monohydrate but after a few months, I could no longer tolerate the indegestion and gas that it gave me. The Pure CEE seems to work better with zero sides. I think once the creatine ethyl esther becomes more know, the creatine monohydrate will become obsolete.