I have the GHD Glide, and I use it a lot. My hair is naturally very fine and limp, so I don't get much volume with it (I get a bit)- but it's good for when I don't want to do full-on straightening, and it's quicker too. The thing I have noticed is that if I go out in damp air afterwards my hair loses more sleekness than it does when I've straightened it, but it could be that I'm just not using the right products with it. You have to use it on dry hair in case that's not clear.