It fried my hair on my first attempt to use it.
The curl was non existent.
I have fine hair, which could have contributed to the problem. Almost any other styling device is better in my humble opinion including hot rollers.
It's hard to use solo to some extent. My hair has gotten caught in it a few times but I found if I reduced the amount of hair that doesn't happen (I personally didn't think it was a lot of hair but the machine feels otherwise). Since you have to use smaller amounts of hair it takes longer to curl mid-length hair. It makes great spirals though! Definitely use the higher heat settings if you want tighter curls. Also, watch a YouTube video to help with tips on how to do your hair by yourself!
I had to practice a little bit, but I really like it My hair doesn't hold a curl well and is really fine, but it does much better with this tool than any I have fine And the price couldn't be beat! I got the professional tool for 10 dollars more than what I could have gotten the cheaper version on the "Black Friday" Sale price Wow!