I loooove this powder. I've stuck with it for about two years now. It's perfect for setting liquid foundation and it's pretty cheap, about $7 at Walmart. The only downside is the pad that comes with it usually falls apart eventually but other than that, it's perfect.
I bought this at Walmart and it was the only primer in the makeup section so of course I got it. It was around $7 and a total waste. It's way too greasy and it did absolutely nothing for me.