What is the best flat iron for really thick and really long hair?

Sedu or Chi :DWhat is the best flat iron for really thick and really long hair?
good qualities of a flat iron depend primarily on heat; some go to 250 F, but it is then takes longer to straighten. I know that curling irons that are good tend to have a ceramic barrel, so maybe a flat iron wit ceramic in it is good since it provides even distribution and penetration of heat to all the hair and can heat up instantly to 400 F. If you do your hair in sections and not all at once, you'll get better results. Maybe you should split your hair into more sections and do one section at a time. Hope this helped!!What is the best flat iron for really thick and really long hair?
The Chi flat iron works wonders.