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. 
If you’ve read enough ghd flat iron reviews, then you’ve probably realized the main problem about this ghd flat iron. It’s the fact that it’s so popular that so many people are trying to peddle fake copies. It’s hard to believe that people would try to come up with fake ghd straighteners, but they’re now like Zippo, Louis Vuitton, and other iconic brands. There are so many fakes around! 
For me, the first and still very best of all ceramic stylers [and my dad is a hairdresser too]. It heats up fast, cools down relatively fast, works wonderfully and lasts a long time. In 11 years, I've bought two such stylers. The first one eventually died after 6 years of daily use, rarely skipping a day, while my second one is still going strong. I have no reason to recommend any other styler but this one. My hair is long and very fine.