I am the official bang-cutter for my SO, because the only time she tried to cut them by herself she ended up with manga-high-bangs. After 2-3 tries I got the handle on that and I am quite good now, but she bought me (well, for me to use) some professional hair scissors that are very different and easier to handle than regular ones. With regular scissors the hair end up behind the blades and everything is easy to fuck up.