IMO the BrakeSmart controller was the best controller ever developed. The Big 3 (Chev/GM, Ford and Dodge) created their Integrated controller after the BS was developed. They worked on the same principle - Master brake fluid pressure.
My reason for comment is the BS controller did not try to tie into the Vehicle computer and brake system. It simply operated the brakes on the trailer. In the early days of the Big 3 IBC there were many problems with ABS and other issues that affected performance of the braking.
The only problem is BrakeSmart is now out of business. Very unfortunate. MaxBrake is most similar. But as long as yours is working properly it should provide the best smooth operating braking available.
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