Over the last year, I've seen these departments and many other departments using ENRADD. Particularly the Upper Allen Police use it on rt 15 all the time, and Camp Hill lazy Police use it the exact same spot (the 35 zone on rt 15 right before you go into Harrisburg) A LOT.
I got a video of Upper Allen Police using it today, here it is:
FYI, I've never yet seen the police try to hide their enradd unit, although ive heard of other police departments doing it. Best defense against enradd is to google some pictures of the unit, know what it looks like, and keep an eye out for it. I've passed enradd speed traps at least 50 times and I've seen them in advance every time.