I agree with Wildcat birdie.
They do extremely well at lighting up reflective things like signs. I really appreciate that when driving at night. I also feel as though they perform better in rain than the halogen lights in any of my previous cars or the cheaper HID's in a BMW I owned. Last, but not least, they also provide great spill and light up the sides of the road quite well - it comes in handy when making turns.
However, outside of those areas, they don't *SEEM* to perform as well as more traditional lighting - I don't perceive the road surface to be as bright, which some people may find disconcerting.
I feel that tradeoff is worth it in terms of the overall performance and uniformity LED lighting provides.
2017 Fusion Sport in lightning blue
401A, moonroof, cooled seats, navigation, and driver assist
3M Color Stable 35 tint, Drive Bright LED puddle lamps; TTR FMIC and Unleashed 93 tune