I forgot to actually say what I use. I use a V1 running custom sweeps and connected via V1C (Bluetooth adapter) to the V1Driver app running in the background on my iPhone. Pairing with V1Driver provides slow-speed muting and auto GPS signal lockouts for stationary signals like automatic doors etc., as well as voice alerts for signal frequency and direction.
Although I use a V1, there's no perfect detector for everyone. The V1 is great, but it's really for someone willing to geek out on radar avoidance. For example, knowing what traffic radar signals are most used in the areas (Ka 34.7 in my case) where you travel and programming the V1 to focus on those particular band segments.
The V1 can be very noisy and annoying if you aren't willing to tweak the settings to use the detector to its full potential. It also doesn't have the crazy range that the Redline or upcoming Uniden R1/R3 have, so it might not be best for those prioritize range/sensitivity over more easily being able to pinpoint location of the threat.
For someone who wants a good performing unit that's plug and play with minimal configuration or even having to manually manage GPS lockouts, there's the Max 360.
For long trips, a decent detector and running an app like Waze for crowdsourcing hazards should have you covered.
I know that I've had several cases where I saw a Ka band signal ramping up on my detector and decided to slow to the posted speed and get in the right lane to allow someone to pass me. They blow past and I see them a few miles later pulled over by Highway Patrol. Just having that feeling one time is worth the price of admission.
Good luck with whatever unit you end up with. They can be helpful as long as you don't see it as a replacement for good situational awareness.