Princeton Tec has a long history of making headlamps. Petzl, Black Diamond, and Princeton Tec represent the companies most recognized in the outdoor world for their headlamps. As compared to these other manufacturers, Princeton Tec has fallen behind lately. Generally, they have a great foundation, but the products seem to be overpriced for the performance.
Performance Comparison

Photo: Abriah Wofford
Trail Finding
The trail finding score of 5 of 10 is about average overall, but disappointing for a $50 light.
Beam Distance Photos
Princeton Tec Vizz
Black Diamond Storm
Close Proximity
The Vizz disappointed us in close proximity testing with optics that has a hot spot in the middle which makes it harder to see everything in your nearby wide field of vision.
Battery Life
Our tests showed the Vizz offering even better battery life, for both high mode, and more so in low mode, than the manufacturer claims in their marketing. We found it to perform a bit above average on battery life.

Photo: Abriah Wofford
Conclusion
At $50 list, the Vizz is a premium priced light that faces some tough competition. The Black Diamond Spot, which scored higher overall, sells for $10 lower list price. The BD Storm offers even more performance, for the same list price.
Princeton Tec has announced in summer of 2018 a new 420 lumen version of the Vizz that may offer a more compelling value.