This is really a general question about the relative merits of dual fuel control methods, not really a question about a specific system.
We know about the tried-and-true method of using outdoor temperature to decide to use heat pump or aux heat. We also have seen some of the newer methods implemented by White-Rodgers and others, that do not use an outside temperature sensor at all, but use some sort or proprietary algorithm to decide.
You can see some youtube videos from White-Rodgers on theirs.
What has been your experience with these, good or bad? What has been customer satisfaction you've noticed? How well do they each work? Is one better at comfort and one better for economy, and why? Pros and cons of each?