I had a GHD flat iron for a few years and while it worked well, I decided to try a different brand when it came time to replace it. I had to have a flat iron with tourmaline and pure ceramic plates, those coated ones just peel and rip your hair out! Anyhow, I came across reviews of the Karmin G3 and decided to buy it.
This flat iron is the best! While sure, my GHD worked well I find that my super curly hair stays straighter longer with the Karmin. I also like that after every use my hair looks better than it does if I don't use it, softer and shinier.
A professional iron that works this good at this price is a major steal and I am so happy I chose to buy it.