I would think it's repeatablility would be determined by how solid the mount is on the rifle.
Have a China version, but the mount is machined into the reciever.
Works well, very odd watching the reticle move when you turn the knobs.
Graduated in meters so I'm at a loss but I have a few settings of my own memorized and they work fine as long as I range tin cans in yardage and then extrapolate the corresponding number of egg rolls to adjust my turrets.
The reticle is never centered like typical scopes you might be used to.
It's clear enough, hopefully never need to buy another.....but would be forced to if this one broke....cause there is no other mounting option.
The uncomfortable question common to all who have had revolutionary changes imposed on them: are we now to accept what was done to us just because it was done?