As a retired LEO, I knew exactly what radar detector to recommend when my son asked my advice. “V1, hands down.”
I explained that all he was reading about the others having GPS was actually to their disadvantage. All LEOs know how to play those detectors; we’ll set up in an area known to be saturated with X- and K-band signals, then zap them when their fancy units go silent in that location because their GPS blocked the alert.
This is a fathers-knows-best story. When his new detector arrived, he plugged it in and went out for a test. On his way back, Bingo, he was zapped as he drove by Home Depot. That place is a X- and K-band hell hole. If he hadn’t chosen V1, it would have been a $500 day.