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).
Top stylists, models and celebrities alike can’t live without their ghds, so you know you’re in good company when you add to your collection. Whether using your ghd styler to tame frizz for a day at your desk, or to curl locks for a night out on the town, ghd not only allows you to straighten your hair, but also twist, curl, flick, wave and bounce too. With ghd, the possibilities are endless.