Works great - Might burn
I have thick wavy hair (think Hermione Granger from the first Harry Potter film) and this flat iron works miracles! I have to turn it to full heat (450 degrees) but I am able to get it done it about 10-15 minutes.  It previously took upwards of 30/45 minutes to fully straighten my hair.  The one complaint I have it that the end gets really hot, there is no outside heat resistant part for me to use my other hand to guide the straightener.
Rating: 4 stars