All radar, like radio waves, have a spreading pattern..it's tight, but not linear..so where the detector is mounted is gonna make minimal difference, imo.
We have a lowered ND Miata Club, a Durango SRT392, and a levelled Ram...very different "ride heights" for the V1G2s, yet all respond nearly identical to hidden radar.
The V1G2 picks up radar SO far away regardless that it's almost annoying at times! Thankfully, the JBV1 app learns to disreguard GPS locations, etc.
My Blendmounted V1G2 isn't a vision blocking concern to me, where on a windshield would be better?!
View attachment 206526
Where would be better?
At the top, just to the left of the DASM, where it only blocks a view of the sky?
At the very bottom, where it only blocks a view of part of the hood?
Looking at your picture, the RD is quite clearly blocking the view of part of your refrigerator. Duh. Is it a huge deal? No. But, why would I NOT choose a spot for it that does NOT block any part of my view of the road and traffic around me?
I agree that top, middle, or bottom doesn't seem likely to make ANY practical difference to the RD performance.
However, I also note that all the "proof" that one position is just as good as another presented here so far is purely anecdotal and does not constitute "proof" of ANYTHING. Maybe if you all had been running 2 identical RD's, one mounted high and one mounted low, for a while and verified that they both always alerted at the same time, in all conditions, then that would start to be actual evidence.
Does the difference between alerting at 1 mile out or 2 miles out matter? Well, no. 1 mile advance warning gives you plenty of time to slow down from any speed to the speed limit.
BUT, what if the cop is running Instant On and the last time they turned it on was when you were still 2 miles away? Then it's the difference between getting a weak alert or not getting one at all until the I/O is turned on and pointing at you...
Have you ever been hit with I/O without any prior warning that it was going to happen? Did it ever occur to you that maybe if you had your detector mounted higher you might have gotten a warning?
My gut says high, middle, or low makes no practical difference. But, y'all have not posted any information that actually confirms that.