Prodigy
We have the Prodigy controller and are very satisfied with it. It is not difficult to set up and works fine. One panic stop proved it to us.
I don't know about other controllers, but as long as any of them work properly which is to stop in a reasonable distance, and are trouble free, that's the main purpose. I mainly chose the Tekonsha product as in my experience they have had excellent reliability for many years.