TechThoughts and shooter Marshall Levy have teamed up to test a variety of different CF media cards for reliability and speed with the new Sony Z7U HDV camcorder with the CF card recorder option. What they discovered is that there is definitely a difference in media quality between brands and cards. In testing, about half the cards showed sync issues with the tape recordings (starting up to 3.5 seconds later), and some showed dropout artifacts. This is very interesting data.