I ended up leaving the slant brake on my rifle because my shooting range has benches only about 3.5 feet apart and they are covered by an overhang that slopes back towards the shooter. When I put on the brake that I bought from CNC Warrior, the concussion is incredible if you are standing off to the side. When you are standing 10 feet away and off to the side of the shooter, you can feel every contour of your facial bones and teeth. However, it is nice to use if there is nobody else on that range and does make the rifle easier to control.
I use my rifle for home defense and since that is my purpose for it, everything I do to it I look at through the prism of usefulness in the case of a home invasion. I chose not to use the brake on my rifle because in a hallway the concussion would damage me almost as much as it would the person who chose to break in. However, the slant brake lets the concussion go more forward and out than forcing it up and directly out the sides. So, just make sure you consider your purpose for the rifle before choosing to change the muzzle device.