I have the Passport 9500ci and had really good luck with the radar portion of it.
I had the laser jammers go off a few times and never got pulled over, so I assumed it worked.
However, I was traveling through the Texas/Louisiana border when I crested a hill and got hit with laser. I was doing 10 MPH over and was able to slow down. I got pulled over and Texas DPS said I was doing 5 over. (I think he just wanted to search the car)
Bottom line is that he was able to "punch through" the jammer at approx 100 yards. I was not impressed with the Passport jammers.
I am looking at doing the Laser Star unit for the ZL1. It seems to have gotten good reviews.
Anybody have any experience with it?