SO easy!
I LOVE this little tool.  I get tons of compliments on how sleek my hair looks with this style, and it is SO easy to use! My hair is fairly thick, and wavy, and a few inches past my shoulders-- it holds style well; I don't have any problem with this staying in. It doesn't dig into my head or feel uncomfortable at all during the day.  It took me a few tries to get the hang of just how to twist my hair and get a feel for when to turn the twist and stick this pin in, but once I got the hang of it, it's been easy ever since.
Rating: 5 stars