I have a couple Escort Passport Radar Detectors and use them but not all the time. More so in the trucks. Really more so when traveling rather then in town.
However, I don't do crazy fast speeds, generally about 7 over the limit. (or at least try) I prefer to be the third truck/car in line. And I am general in the right lane and let the fast car be in front of me in the left lane.
What I do use MORE, and seems to work really well is the "Waze" app. It's free, a social media type app, real time, shows traffic jams, 5-0 reporting, red light cameras, cars stopped on the road, construction zones, etc, etc. It's also a GPS, shows POI, school zones, and I'm sure more that I didn't even mention.
It's nice that you can have your Pandora on, listening to music and use this app. If something comes up, it over rides the music.
It's amazing how many folks that are on the road that use this app. as you can see them as you pass by.
YB