The InStyler straightening iron is assuredly the least effective hair straightener I've ever used. I was duped into buying it and sorely regret that decision! I spent $50 on it (a "discounted" price) and only used it once. It did not straighten my coarse, thick hair any better than a blow dryer would. I set it on the highest heat setting, and it left my hair looking big and frizzy. I've used other straighteners that work much, much better. I would strongly advise against buying this, especially if you have thick or coarse hair. It doesn't work! read full review »