The R3 supposedly has awesome filtering for private cars with all the sensors for blindspot, lane hold, cruise, etc...
I was reading one guy had a Max 360 but it was unusable in his car because all it did was beep at his own tech. He put the R3 in and it was silent. R3 also has stealth tech so detector detectors can't see it in US states and Canadian provinces where it's illegal to use one.