Cmc has a bad reputation that they defanatlly earned with a lot of crap media so don't expect a lot of people to like them. The 8x disks (cmcmage01 and thier - counterpart) use phillips dye which seems to be much beter. As far as the longevity, I haven't heard of the e01 fading yet (if anyone has please post the source because I have a bunch of these and would really like to know if I cannot trust them). I think the longevity talk is more because of thier reputation with older media types, not because of performance of the new stuff.
My personal opinion is they are prety good (been using them for 3-4 months or so) and I get consistant good burns from diffrent packs and brands. Avoid any cmc that is less than 8x like the plague though.