To arrive at the more safe bike paths, I always have to ride on the streets. I always ride in the day time, never in the dark. With the Urban on pulse mode, I've noticed that vehicle drivers more readily notice me, and are much more respectful in allowing me space or the right of way. I believe the really dangerous drivers such as those that are distracted by talking on the cell phone, and the very senior people with vision issues are much more likely to actually see me when I have the Urban light on. Although I never take any driver for granted, I do feel more safe with the light.
I use this for night riding, especially after an evening at the brewery for open mike night. It works like it says in the manual and does not seem to affect the mechanics of the bike which surprised me considering it uses so many batteries. Its easy to turn on, but hard to find the on off button in the dark. You have to press the off button several times to get it to turn off. That's slightly annoying. When hanging your bike, take care not to damage the device.