Check out
Radar Detector & Laser Jammer Forum. Lots of good info there. I mount my Passport Max center and down low on the windshield. I don't like mounting it high up next to the mirror as it tends to block my view. From what I've read, mounting high is better for radar detection while mounting low benefits lidar detection but unless you're running a jammer, it's doubtful you will be able to slow down enough within that 1-2 sec lidar detection window to be of any use.