Super slim and the brightness is so good! the arm is sturdy which is great for using on the go. I've seen other reviews saying that it's difficult to open but I haven't experienced that. I think it's actually quite easy to open, it requires very little force. Put it on a flat surface (your lap will do just fine while you're sitting) & I just place my nail under the tab and push it up to open. Not sure why people are opening it while standing and are surprised that the mirror breaks after being dropped from a certain height? Very avoidable lol.