I just bought this brush and I'm very impressed with it. It's oval and about 3 inches across. Their other brush is 4 inches, same as the Revlon size, and it's too big for my shoulder length hair. I also have the Revlon. I prefer the L'ange because it's smaller and I get more oomph. The Revlon straightens my hair. Also, the L'ange has a metal plate for more heat and the Revlon is plastic. I don't use it on high heat, too hot. It's fairly quiet and the handle is not as big. I think it's also less weight. I got it last week on sale for $71 and free shipping.
I also have the Conair rotating brush which I really like. I do get more curl with this and it stays in longer. There is a learning curve to it. I have to do smaller sections and watch it carefully because it will take the last little bit on the roller and twist it. Also, the brush wears out and you can't buy just a new brush.
So, the L'ange is my favorite, the Conair second, and Revlon last. I have very thick curly hair. I haven't tried their products yet.