When we first brought GHD into the Salon I thought exactly the same thing. How can they be that much better? I have now changed my mind.
We have use all sort of straighteners in the salon and we get a lot of feedback from our clients about their straighteners and GHD are easily the best. All our stylists say they are much better.
You have to remember that just having hot irons on your hair is basically bad for it so the higher the temperature, the worse it is.
GHD doesn't have to rely of a really hot temperature because it's patented design distributes the heat evenly over the plate and keeps it a a constant temperature. GHD's are set at 190 degrees so are better for your hair.
The build quality is also much better than any other straighteners we have used.
Regards
Oliver
www.the-salon.net