I had a ZR4 installed on Challenger before doing proper research. I had Escort 8500 Radar detectors in both cars and the hook for me is that the ZR4 interfaces to both with an additional cable. After doing some research on this forum and others it appears the LI was a favorite so I had that installed on ZR1. the installer made some mistakes and actually tore one of the sensor wires pulling it too aggresively through the firewall.
LI support was incredible. they provided a new sensor and delivered it free of charge which shocked me. In addition they brought out a slew of Lidar guns to check the installs on both cars. I was amazed at the performance.
although the ZR4 is nowhere near as effective as the LI it does at least provide some warning and a small amount of time to back down on speed prior to getting nabbed. For newbies looking for info i can say the LI performance is incredible and so is the support from LI (Cliff) who actually delivered the new sensor and was helpful and guided the installer on installation.
very happy customer