The Vergo is basically a Cinch v2. Trango did have a long recall saga that appears to be over. The issues were relatively minor but I understand them wanting to make sure all units are 100%. I had patience and just waiting for a new unit, and then bought an extra unit once they showed up on BC again.
The Vergo (and Cinch before it) are different than the GriGri, LifeGuard, etc, in that it is not based on rope friction and velocity working vs. the spring tension built into the device. The Vergo works solely on the rope path: assuming that there is a straight line between the load (IE, the first clip or pro, or the anchor for a TR route) and the carabiner that connects your belay loop to the other end of the Vergo, it will lock based on the tension on the rope (ie, the rope direction and some pulling force). The other cool thing about the Vergo is that the locking mechanism is not "deactivated" when you pay out slack, not even weakly or temporarily.
Although not sanctioned by Trango, I've done tests and the Vergo locks up solidly on half ropes that are less than 8mm.