Sketch is on it's way to being what Illustrator should be. It's still a little buggy at times, for instance, you can't export things at high resolution and the workaround, resizing a group of objects, rarely works correctly.
I've completely ditched the entire Adobe Suite for Sketch and Pixelmator.
Pixelmator lacks the full layer styles, but it's slowly getting some of them.
Though I can appreciate what Sketch is trying to do, I feel like Pixelmators performance and layout is better suited for me.