Took mine out to shoot for the first time this weekend; installed on a 16" .308 AR.
Since I didn't have other muzzle breaks there with me to try out on the same rifle, it makes it a bit difficult to make any comparisons. However, it struck me as being a good compromise between recoil reduction and blast/noise.
It appeared to be very well made and nicely finished, also.
Like someone has already mentioned, large flashes occur seemingly at random. Ammo related? Dunno.