Ok so, I don't know if this is common knowledge but it's new to me. I discovered that you can use ANY pen with a metal tip as a stylus on the S5. You can even use a pencil! Now when I say metal tip I'm talking about the end piece of the pen. The part that the ball point pop's in and out of when you click the pen. Not the actual ball point. It works very well. Great for tapping tiny things on Web pages, and I never lose it because I always have my pen on me at work anyway. It doesn't scratch either. I mean, I have a screen protector on and it doesn't even scratch that.
(UPDATE) I forgot to mention, you have to enable "Increase touch screen sensitivity" in the settings under display.
(UPDATE) I forgot to mention, you have to enable "Increase touch screen sensitivity" in the settings under display.