ION or GVP from Sally

I bought my flat iron from Sally Beauty Supply store or you can buy from its website.  I bought ION Ceramic flat iron ION Ceramic flat ironabout 10 years ago, and I really love it.  I have very thick hair.  But it works very well.  I recently bought GVP Ceramic and it is really easy to use and you can use it to make curly hair too.  They both are very good quality and works very well on any types of hair.