I worked in the hair industry for a while so I've used a lot of high end flat irons and I got to say, this one did not impress me at all. I'd never used a GHD before this btw (none of the stylists I know have one) but I ended up ordering the GHD classic styler--which btw seems to be the same as the "IV styler"--instead of the CHI Turbo due to the fact that at the time, the GHD was on sale and basically the same price yet it offered more versatility (the turbo has a velvet cover so you can't use it to curl).
BEWARE of sellers with LOW FEEDBACK! Ask sellers questions about the 22 things I have pointed out above. If they do not answer, don't buy! If they make excuses, don't buy! Also, some buyers who have been ripped off are trying to resell their GHD's to cut their losses. Watch for things like "I got it as a gift" or "I recently cut my hair". One of the seller's I purchased from was supposed to be shipping out of Georgia but he really shipped from China. Don't believe everything you read about a seller's information. They can lie.
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This overpriced iron is good if you have naturally fine, soft or wavy hair. If you have coarse, thick hair it will not do the job, or it will take you several passes. This is not unique to the GHD, this applies to ALL CERAMIC straighteners. The Auto shut off and dual voltage is awesome, but it is not worth it if the iron does not provide sleek, durable straight hair. If you have kinky, unruly, poofy hair go with TItanium, hand down!!