Reminders is very clunky, interface wise.
REMINDERS IPHONE:
* Reminders can't re-arrange the order of tasks without hitting the "Edit" button first. Then you can drag your tasks around, and then have to hit the "Done" button. Three clicks minimum to rearrange the order of a task, while Clear does it in one single click.
* Reminders "+" button is not very responsive (to add a new task). Often, I have to hit it a couple times to get it to create a new task entry. Clear does this with a simple, reliable drag of your thumb.
* Reminders places all new tasks at the bottom of your list, but when you launch the app, it shows you the top of your list, so you can't see the tasks you just entered until scrolling down. Clear enters new tasks at the top of the list, where you can see them and decide how to order them without unnecessary scrolling. Also, Clear lets you insert a new task at any position in a task list with a simple reverse-pinch. With Reminders, it takes several steps to do that.
REMINDERS MAC
Similar differences between the desktop apps as well. Plus, Reminders Desktop doesn't sync immediately with the iPhone app. You sometimes have to quit Reminders and then relaunch to make it sync. We'll see how the Clear Mac app does on the synching account...
THE ONLY advantage Reminders has over its competition, in my view, is that you can speak Reminders/Remembers right into Siri. Wish Apple would let other developers use that functionality.