Most pleasant "surprise" so far I think is the side lights that turn on when you're in a dark part of the road and turn off when there's enough light. I have no idea what lights they are - if they're my fog lights, or just side marker lights - but when you are driving at night, if you get into a dark part of a road with no street lights all of a sudden you have decent side lighting such that you can see off to both sides of the truck instead of just straight ahead like normal headlights. I really like this feature.