Review on High Sensitivity Stylus Pens for Touch Screens - Apple iPad Compatible, Capacitive Pencil for Kids and Students - Drawing and Writing on Tablets, Smartphones (White) by Leon Thompkins

If you use expensive electronics for digital ink, DO NOT BUY THIS PEN. I bought this and it scraped the crap out of my screen. Luckily my tablet was very cheap so I wasn't too upset about it, but the stylus left deep scratches on the screen that I didn't see until I finished drawing and turned off the tablet. If you care about your screen, don't buy it. If you buy it anyway, at least put a screen protector on it.