I've been using a BrakeSmart for about 3 1/2 years and 400k miles. My experience has been all positive. I did have a minor problem early on and the old BrakeSmart company sent me a replacement at no charge with my promise that I would return the one I had. They were a great company who stood behind their product. Later, when the new owners, Mr. Performance, took over I called them with a technical question about the controller. They were very helpful. I have nothing but praise for the companies and product.
Having said the above, I also like Southwest Wheel. I have bought lots of parts from them and some service over the years in my hometown and have nothing but good to say about them. I read the link to the new MaxBrake above and it appears to use exactly the same technology as BrakeSmart. My guess is the founder of the new company has some insider experience with BrakeSmart. No matter, it appears to be a knockoff from the BrakeSmart and is priced slightly cheaper, at least for now.
A buyer now has a choice. I'd probably buy either. Competition is good. That is what makes America great.
Harvey