Trust me I've tried them all, and I still felt that I needed to develop my own out of necessity. I'm studying interaction design, so something which is usable is really important to me.

I would argue that every app I used had minor issues which evolved into major issues over time. Poor visual design, visibility and readabilty, too cluttered or unintuitive, etc. I set out for the app to do one thing, and excel at it without issues.