Against the ghd IV Styler: Although the IV Styler is one of the original products in the ghd range, it’s still pretty beloved amongst customers, especially because of its affordable price. Unlike the new ghd Gold Professional Styler, though, this product only boasts one sensor that stretches across both plates, meaning it’s less intuitive at heating your hair.
This straightener heats up in such a short period of time, the beeping is helpful to know when it’s ready for use. It reaches an adequate temperature, no fuss or changing settings. It takes me approximately 20 minutes to straighten my hair completely, and I have naturally frizzy, curly hair. The health of my hair has not been affected by the straightener whatsoever. Highly recommended and wouldn’t use any other brand.

I gave it three sticks because my hair did eventually get straight and at no point did I feel like it harmed my hair, but it's not even adjustable because again, the company claims that this iron auto-adjusts according to hair "conductivity" or some bullshit like that (this is a laughable claim). It does have auto-shut off but so do a lot of irons (or at least the high end ones). Honestly, I can only conclude that this is another one of those hyped up beauty products aimed at people who think more $$$= better product and performance but a straightener is a straightener so once you get past the $100 price point it all comes down to personal preference and there's really not much more you're gonna get for your money...
Inferior hair straighteners take a very long time to heat, and you really need to make sure that they’re on their highest setting to have any effect. But that means getting lots of split ends, and you hair often looks frizzy, dry, and generally unhealthy. And once you go outside, if ever you live in an area that’s a bit humid the straight hair quickly goes to its default pouf settings. 
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!! 
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