This is second hand anecdotal evidence so please take this for exactly what it is worth.
Based on a recommendation I do plan to purchase one as a $29 or $49 experiment for a Tippmann I am setting up for Metal Madness.
I had a chance to meet the gunsmith from Tippmann at an event earlier this month. We talked at length and one of the subjects was muzzle devices. I had him change my barrel to the lightweight fluted barrel, and I had a compensator on it.
He asked how I liked it and I didn't really have an answer. I was using it as a thread protector because I shoot rimfire almost exclusively suppressed. I am looking at getting an effective brake because subsonic suppressed ammo will not reliably trigger the shot timer.
He works on their warranty guns a does quite a bit of function checking on customer guns. He said that of all the stuff he has tested on customer guns, one stood out as having no muzzle movement.
The Carolina Crusher from Wiland Industries. When I looked at their site, they have another one that's a little more expensive but was developed with a competitive shooter so I am not sure which one I will get but I'm going to try one of them.
I figure the gunsmith at Tippmann has tried a lot more brakes on their guns than I ever will so I will try one and if it doesn't work I'll chalk it up to the learning process.