I used to believe the people on this forum when they were talking smack about the M4 platforms. Saying that it is a cheaper design and so forth. But I finally got tired of all the k band falses from my s7 Vector 955 that I just sold it and got a vector 965 with the M4. What a huge difference. That was the best move I ever made. It's almost as quiet as my 9500i was and as quiet as my pro 78. In addition to being way quieter, it has a much clearer, brighter display, the speaker sounds 10 times as crisp and much louder than my S7. The voice alerts are much louder on the S7 but it was also distorted. I like the fact that the M4 antenna only sees radar that I should be concerned with, not all radar that is present. To make a long story short, my S7 vector 955 reminded me of my V1 which went off at every walmart location. So much that I nicknamed my V1 my walmart detector. While the M4 965 only alerts when radar is pointing at me.