Hi Jacob, thanks! It was life changing for me and my team — Which I think is the true benefit. When you start saving time for multiple people and eliminating the back and forth of “What hex value was it again?” or “What’s our large button width again?” you really see the time/cost savings. Additionally, having buttons as a symbol means that you can nest them inside OTHER symbols which snowballs this time saving effect: https://dl.dropboxusercontent.com/u/33753794/Overrides.png

For a waaaay deeper understanding of this principle, I suggest you check out Jon Moore’s article on nested symbols which will essentially turn you into a Sketch demi-god: https://medium.com/ux-power-tools/this-is-without-a-doubt-the-coolest-sketch-technique-youll-see-all-day-ddefa65ea959#.jxjuvid03