From what I know, Brake Smart is no longer available. While in the market for a new controller last summer, I did some research and read almost nothing but good about Brake Smart. In fact, the the former owner of my FL70 had one on it but was not selling it with the truck.
Not to bash but when I read about the company that was selling it, I stopped then and there. Beyond that, do some research. Let's just say that we all know people who make fantastic claims but we are smart enough to take those claims with a "grain of salt". I am not talking about the controller here by the way.
Unless you can always afford the best, I would consider your needs. For the occasiona relatively light tow job, why spend three or four hundred dollars?