I own the Instyler and it smooths out my hair very nicely. I still have never been able to get curls which really bugs me. There are a lot less expensive hair irons out there that work even better.
I am a mother of two toddlers and I don't always have so much time or patience to style my hair anymore. Plus my hair is very long, and takes a while. My mom actually got this for me as a birthday gift, and I gotta say I love this. I don't even have to brush my hair before using the Instyler...