Mine is the first car i've had with an electronic handbrake, and I hear noises from brakes applying and releasing far more than on any other car i've had.
To be honest, I've put it down to a characteristic of the car. There are no warning lights, and the car doesn't appear to be detrimentally affected when stopping or when pulling away. My Dad's Land Rover also has an electronic handbrake and makes similar noises. I'll monitor it but i'm not overly concerned.