The most satisfying checkbox is one that visibly registers my input in less than 100ms and never forgets.
There's a good argument to be made for a special checkbox / button that you press infrequently as a reward for completing an activity for a habit you are building.
We already distilled the complexity. It’s beautiful for the simplicity. A checkbox with an “experience” is the tacky chromed out Harley cruiser next to the essential cafe racer that is… well, a check box.
Less is more.