I had the V1 for 6-7 years, now happy with an Escort 9500ix. I loved the V1, but grew tired of the incessant false alarms and having to hit the button constantly to shut it up. The Escort is much better in that sense (GPS enabled, so it learns to lock out repeat false alarms over time, warns you of upcoming speed and red light cameras, etc.) The V1 could sniff out bogeys from incredible distances, the Escort a little less so perhaps, but still gives you plenty of time to react to all types of radar guns. One big hiccup of the Escort - or any other dash mounted GPS-aware detectors - in a Land Rover is that, if you have a heated windshield without a "pass-through" area to mount it, the detector will sometimes fail to lock on the birds up there for long periods of time, so it becomes as "dumb" as a Valentine 1, courtesy of those tiny heating filaments sandwiched in the glass. Mine will sometimes lock onto satellites right away, sometimes it won't for 30 minutes or more... It is probably dependent on where the nearest birds are at that time of the day/night. It's a crapshoot. The filaments don't seem to affect radar detection, though.
Active laser countermeasures are illegal here in SoCal, so I haven't taken a chance on jammers, even though more and more CHP officers and some local police are starting to use laser guns to clock speed. Both V1 and Escort will sound an especially dire alarm and light up like Christmas trees when they detect lidar - but by then, it's usually too late of course - if you were speeding.