My experience w/ these spoke lights continues to be very favorable.My plan is to always use these spoke lights on roadways at night. IMO these spoke lights are at-least as important as the front and rear lights for bicycle visibility to the person sitting behind the steering wheel.
Now that I am also operating on very hilly roads I've noticed that the spoke lights have an effect on wheel balance at higher speeds. I've noticed zero effect at speeds around 20 mph, but when going downhill at higher speeds there is a slight pulsing felt from the wheels that I attribute to the wheel balance being off.