Can you explain what makes things worthwhile for you? I’ve taken a look at it but to me it looks like every other todo app out there. I don’t have any specific use case for a to do app other than a chockable list though.
UI is just very quick and simple and not intimidating. I don't like labeling colors (like Todoist, MS ToDo) on my tasks too since it will take more work and time to think.
What I most used is their deadline feature. On other to-do apps this is the due date, but for me that concept is a little confusing, since I use Things for both work, family and personal.
I have a recurring project called Monthly Bills and each tasks has a deadline of their payment.
It’s nice to use. That’s the main reason for me. It’s a specific app for each device (phone, tablet and laptop). Which means the UX is specifically tailored to the patterns of the device. The closest to it for me is Bear (my note taking app). IA Writer and Reeder came close (still not as nice)