Safe, easy and it works.
This brush works really well.  My 2 year old has a lot of curly hair and this worked so quick and easily on her.  I wasn't going to even try it but she saw me doing mine and wanted hers done.  It's much safer to use on a little one's hair as there's no way to burn them.  It works well on my over-40, color treated hair that was once pin straight but has now got some course wave to it.  I did have to do it in sections and just brush through numerous times.  Unlike a flat iron, there's no way to leave a weird line, you just brush through.  The only reason I wouldn't give 5 stars is the adjustment buttons are on the side and I'm constantly pressing them on accident while brushing.  The buttons raise or lower the temperature by 5 degrees.  It's not a huge deal, but the design should be changed to protect the buttons better.  I would buy this product again.
Rating: 4 stars