Firstly, everyone loves to tout the wonders of Capitalism but then complain about globalism, but that's a discussion for another day.
Secondly, I've been a fan of DW filters since they came out. While I've never used one, I've seen nothing but good things when people post of them. How long did you run it for? What type of driving?
P.S. I don't know about you but last night (our first true snow fall in NW Chicagoland) got icy real quick! Hopefully that's not a sign of what's to come.