Looks like Duracell's found a Compact Flash manufacturer to slap their name onto. These are newly released 600x speed cards, which the real company 'Dane Elec' doesn't appear to have had before Duracell. One article stated the true speeds are actually closer to 500x, not sure if that's true, but that's still quite a bit of speed. A Duracell 32GB 600x Compact Flash card can run close to $90 US over on eBay, while on Amazon they're currently about $60 US, making them the cheapest 600x on the market.
Now i've been using Kingston 32GB 133x early on which I still have for light video and light Photography, then switched over to Transcend 32GB 400x cards. I've been using all Transcend cards since in both CF and SDHC formats with no issues. I'm not ready to try anything new, but maybe a brave soul has already tested these out. Anyone have any real information or link to a review on these new Dane Elec / Duracell 600x's?