I bought the Vis 500 commuter combo (and the Red Racer). This is the second time I've bought light & motion lights for my bike. They are very bright and durable, and I feel very comfortable biking at night. I like that the pulsing mode is not a strobe, as I've had too look into too many oncoming strobe bike lights and it is not pleasant.
The Vya bike tail light is maybe too advanced... It fits well on my bike and is also bright, but not the most intuitive thing to use since it is so different from normal bike lights. I also do not think the pulsing mode on it is as eye friendly as the Vis because it does have a short strobe flash. The battery remaining indicators are also well-intentioned but difficult to interpret with different lights coming on/off with different amounts of power remaining.
Overall these are very good, very bright lights, but some of their special features are more advanced than I would prefer.