Today is the first day this went active in walnut creek so we went to go test it out by driving around the city. I am impressed with the concept and I can imagine this being very useful for smoothing out traffic flow once its refined. (And even more so if we all get self driving cars)
That said, there were a few day 1 issues:
The count down timer often isnt accurate and often resets. For example it will countdown to 5 seconds and reset to 23 seconds so you end up waiting longer than you expected. Additionally, sometimes the countdown doesnt show up at all and it just turns green; or the app doesnt chime 5 seconds prior to the light change and just remains silent and turns green.
At one light, we also got the countdown for the light that was perpendicular to us, though that may be a gps issue rather than the apps fault.
Finally it might be more intuitive if the signal on the screen turned green rather than white.
TIP: if your phone automatically syncs to your cars Bluetooth, remember to turn on the radio otherwise you wont get the audio prompts.
Cardesigne about EnLighten