Sometimes it works just fine, other times it will skip a part of the writing. Like, imaging if you are writing a O and a quarter of the circle was missing. Feels like a real pen, when it works it works great, but the reliability was really frustrating. Also this kind of thing is impossible to prove to the repair department because guess what it work perfectly when you try to prove something is wrong with it :) Tried changing battery to no effect. Recommand caution when purchasing.