I know all about the addiction.
My first ceramic flat iron was a coated one and I didnt know it. It was by hot tools. Anyway, one of my friends told me that she flat ironed with coconut oil and it got her hair really straight. I did the same and boy, do I regret it. I didnt know that ceramics caused damage, so I flat ironed with coconut oil and had the flat iron on high. My hair was looking lovely for a few months but it thinned out and started to break. This near the end of 2004.
Early this year I got my Sedu. It is the real deal and I love it. Since 2004, I've learned not to fry my hair with oil so I use the best heat protectants (frizz solutions ion straight or Nexxus Heat Protexx)... but up until a couple of months ago, I was still flat ironing on one of the highest settings. That is a no-no and will cause damage regardless of whether or not your iron is ceramic. Since, I've learned that I can flat iron my hair pretty good on 270 somethin' degrees and it comes out about 95% straight.
As long as you deep condition, moisturize, limit your usage to 2X per month AND decrease the heat settings, your damage should be minimal.