it's anecdata but I drive this this on the regular and don't have any issues! May be some regional differences
Not only can I see everything beyond the car in front of me, I tend to "soak" up the braking energy when there is a panic braking incident in front of me. I have no data to back this up, but I'm almost positive I've kept traffic moving much better behind me and prevented rear ending incidents using this tactic. Also, I wouldn't downplay the amount of fuel that is being saved that comes with not having to almost stop, then start over again from the slinky effect.