I heard similar stories from V1 to 9500ix converts, no problems, better range, etc. I've had great results in my area with the 9500ix. I do think cops simply sometimes don't have radar on and therefore the RD can't pick it up. This has happened to me a couple times here and there in more densely populated areas (where I wouldn't speed anyways).
AWE NR | SWIFT SR| PAGID RS29 | RE71 R | 6MT