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I heard cheek slap is still pretty bad with these and the slant brake. Thoughts?
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Yes cheek slap is pretty bad especially if you are shooting lefthanded like I do. Right handed is probably not as bad. The bar runs to the right of the rifle's axis so its worse for lefthanded shooters. If you are going tacticool, I would go with one of FAB defense's folding stocks. If you want to keep it original, you can buy the beaver barf butt stocks all over ebay. They're pretty affordable and A LOT more comfortable to shoot.
As far as the slant break, it makes the cheek slap worse because I doubt it is doing much at all. I have heard that it works pretty decent on an AK (that's what it was made for), but it doesnt work so well on the VZ.
Whatever you do don't cut your barrel unless you want to SBR it or something.