I debated this topic with my self for many years and finally had a brake installed on a 300wm.
Prior to the brake I could get 5-6 shots before I had to put it away.
Now I look forward to shooting it. It made a huge difference in my ability to shoot that rifle.
Now alot is said about "if you need a brake you are a wussie" etc etc.
My bottom line is I did not like shooting the 300 before, now its the first rifle I grab when I go shooting.
I do not like the noise, but i always wear hearing protection and will have to be sure that I have it when hunting, secondly the "next" brake I have installed will not be ported on the bottom.
My main hunting rig is a 30-06 which I have many rounds thru and can shoot pretty well. I am seriously considering puting a brake on it.
As mentioned before, try to shoot a rifle with a brake on it before you decide if its right for you.
That my take.