Unique design, better functioning design upgrade from the first version.
If you over-tighten it, you may crush your bars and ovalize your steerer tube. Under-tighten it maybe slightly and your bars may move slightly. Knurling on some bars may be slightly big making the bars hard to fit into the stem.
Out of paranoia and unique clamping technique, I tend to not run these types of stems and just stick to the tradition 4 bolt face plate and 2 bolt rear pinching.