Don't ever consider buying any other brand of hair straighteners. I have very curly hair and these are the only straighteners that actually so the job and I have tried many over the last 15 years.
At the price of a coffee and sandwich, you will be over the moon with the Revlon 5265CU Shape and Smooth Air Styler. It boasts 108 Amazon customer reviews with combination of 74 at 4 or 5 stars; I believe this is an excellent low cost air styler. I would buy one of these just as a spare or to carry round as it is also lightweight so makes for a good travel solution.
hot immediately smooth easy to use recommended by my hairstylists and well worth the money have not owned a chi so can't compare.
A replacement as loved the first ghd straightener I bought.