I only have shoulder length hair right now, but my hair used to be down to the bottom of my shoulder blades. My hair is also very thick so I have a hard time with it no matter what length it is. I've used all kinds of detanglers, conditioners and different types of brushes to brush my hair without pulling huge amounts out. I had seen a few other reviews for the Knot Genie and I've seen ads on the internet. So when USFamilyguide.com offered the chance to get one free I was very happy. Nothing to lose right? Right! Even with only shoulder length hair it can take me 10 minutes just to comb through my hair after a shower. The Knot Genie is really like magic! When I brushed my hair I didn't utter one single cuss word LOL. Those who know me well will know what a big deal that is. The full size Knot Genie that I got is a little awkward to hold, for me anyways, but doesn't take away from the usefulness. I'd tell anyone with hair longer than a buzz cut to get one of these!