I've had a bunch of muzzle devices and brakes on different Vz's over the years, and my favorite overall has probably been the "special forces" brake Corwin Arms used to sell. The issued military one is also good.
I'm going to agree with this.
It isn't the best "brake" per se, in terms of reducing muzzle climb etc. But it makes up for it in other ways - really clean lines and snag free. It's the one I ended up sticking with after trying a bunch.
The "square" brake from Corwin was actually the best performing brake of the ones I tried, in terms of eliminating muzzle rise and felt recoil - not that x39 has a lot of recoil, but eliminating it just lets you stay on target and keep squeezing the trigger effortlessly for faster follow up shots. The down side to it, is that to me looks kind of clunky, and spending a day with it attached, kicking around the farm, every time I set it down, or against a hay bail or tree, the square brake would collect grass, hay, leaves, twigs, etc., it just wanted to grab and snag things.
But, like I said, in terms of performance, it was the absolute clear winner. If you do most of your shooting at the range, or want to run a VZ through a 3-gun match for shiznits and giggles, I'd go with the square brake. If you plan on using the gun in the field as a coyote gun etc. (and the 58 is a spectacularly good coyote gun), I'd track down one of the special forces brakes on the EE.