Dan Duett
Dan Duett reviewedThings 3.0Complete revamp of the original, award-winning task manager
 RecommendedPros: 

Incredibly well designed, seamlessly integrated across devices

Cons: 

None

I've used Things since 2010. It's the app I couldn't live without. To use it well, familiarize yourself with David Allen's "Getting Things Done" methodology.

Dan Duett has used this product for one year.