I'm just learning of the preferred route feature. I typically use Waze, but have been wanting a preferred route option for a very long time. I guess I'm an Apple Maps user now. I'm excited to see how well it works. My preferred route to/from work avoids the interstate, but is 5 minutes longer, so no GPS wants to direct me to go that way. It will be awesome if Apple Maps does what I want it to.
It works well…and even tells you on the screen when other options are listed which one is your preferred route based on history.