I don't know anything about the Six Star products, but as for a creatine products go, it's not really all that cheap.
If you're talking about the "Advanced Creatine" powder product in the 2 lb size, I know it seems cheap but it's only 16 servings because there is a bunch of other stuff thrown in.
Depending on what you want to use, you can find cheaper than that. I think Primaforce has a 125 serving CEE for $20. But regular creatine mono is going to be the cheapest way you can go.