@rnv They're both excellent tools, I prefer OmniFocus - they provide a community for their tools, and the app suits my needs better. However when I tried Things I thought it to be very good too.
Replying to:

@rnv They're both excellent tools, I prefer OmniFocus - they provide a community for their tools, and the app suits my needs better. However when I tried Things I thought it to be very good too.