I put a set exactly the same on my RR over 2000 miles ago. Had the wheels off at the weekend and removed them to check them over - no play anywhere, everything exactly as when I put them on - and the adjustment has been very straightforward. I also checked the, for alignment and the markers etched into them were within 0.15mm of each other, which I'd say was close enough. I also tested the adjuster clicks for accuracy, and a '10 click' adjustment on both sides yielded an equal change in position.
For or the money, I'm very happy with mine. They've gone through winter with no corrosion whatsoever despite my lack of cleaning them, they've made chain-love quicker and easier, they look good, and fit well.
I also noticed the issue with the markings being covered, so I took them to my sister (who has a laser cutter in her school department) and she extended the etched markings right to the edge and over it - means it's just visible against the fixed markers when the axle nut and spindle are fitted. Sure, it's a bit more fiddly to see than a Lightech pair, but for the ?100+ saving I can live with that.