I've had no incidents with the AEB so far, just a couple of warning bleeps, but it may be that most of my trips are short urban journeys and at low speed, mostly 30-40 mph zones.
I think the car is set up too sensitive and doesn't take into account the actual reaction times of the average driver, a bit like the stopping distances in the highway code that are based on 50 year old braking systems, it's like it wants you to drive slower than necessary.