As mentioned earlier, the GHD classic Styler uses ceramic plates which heat up faster than other materials but it doesn’t emit negative ions like tourmaline flat irons, which doesn’t only straighten hairs smoothly but also makes dry and damaged hairs healthy by counteracting with positive ions. So, in terms of professional use and/or greatest results, GHD classic styler can’t be recommended. That is my personal opinion as an author. As an alternative, I can recommend you to read CHI Air hair iron review, it is tourmaline ceramic, and thus little more in price in comparison to classic styler.
This flat iron stopped working less than a year after I bought it and ghd will not warranty a replacement one because Planet Beauty or Amazon is not an authorized retailer for their products. Buyer BEWARE....if you purchase from here it will void the manufacturer warranty and you will waste your money just like I did. Planet Beauty was NO help to me in getting my flat iron fixed or replaced!
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).
For curling, place a section of hair between the plates closest to the scalp, clamp the plates, and turn styler through 180 degrees while holding the end of the strand. Pull styler through the hair slowly, always maintaining the 180 degree turn--it helps to slightly tip the nose of the styler downward, careful not to let the hair fall out. It also helps to pull the strand forward when trying to curl hair at the back of the head.
The secret to ghd's straightening success lies in those ceramic plates, which are rounded to let savvy users create curls and waves as well as the classically sleek poker-straight look. The plates smooth your hair as they straighten, calming frizz and leaving you with gorgeously glossy locks. The safety-conscious sleep mode means that they'll switch themselves off after 30 minutes, and since they're available in a wide range of colours including pink, purple, black and blue, you can even choose a style that matches your bedroom. All of ghd's straighteners and stylers come with cords at least 2.7m long, giving you the flexibility to position them within easy reach of a full-length mirror.
As far as we’re concerned, this is the best hair straightener we’ve tried. Not only does it heat up in record time (only 30 seconds until it hits 365°F), it’s also been lauded for its frizz fighting capabilities—as mentioned above, a must down South. What’s more, it lasts. One editor’s trusty Classic Styler is still going strong after 4 years of almost daily use.  
GHD Classic Styler, from the name itself, you can deduce that this simple yet versatile device was made to style and straighten. Armed with a rounded barrel and advanced ceramic heaters, you can curl, flip, tease, wave, and straighten any hair type and texture easily without damaging your hair’s external surface. The infra-red heat technology infused within the plates also releases more negative ions than other products so your hair’s natural oils and luster are retained despite repeated exposure to maximum heat.
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