I had the 9500ci installed on my 335xi about a month ago...so here are some thoughts and anecdotes...
First off, I had the display and controller mounted in my ashtray so I can flip it down and be totally concealed. That part of the install looks similar to this one: Escort 9500ci Thread - M3 Forum 2008 BMW M3 2007 BMW M3 BMW E90 M3 E92
I have the radar and laser shifters behind my lower honeycomb grills aswell...similar to this install from above...I more or less copied him.
Anyway, in the month I've had it, it has saved me numerous times, most of them, any radar detector likely would have, but there are 2 instances that I'm convinced I would have gotten caught w/o this particular one.
#1-There is a building on my way to work that has an X-band signal. It went off the first few times I went past back and forth to work, and then it "stored" and had been silent since. One day the X-band went off again as I approached, so I slowed down just in case. And there was a LEO parked right next to that building sampling traffic...using old radar tech next to a known source of X-band (sneaky) so the GPS functionality worked perfectly and I'm sure any other radar would have just acted as it normally would as it approached and not offered true warning.
#2-Well, with this one I'm not saying other laser jammers wouldn't have worked, but I'm saying in this case, mine did. I was going about 60 in a 35 when my laser alerted and started shifting. I look ahead and see a motorcycle LEO "hiding" ahead and pointing his laser gun right at me. The range at this time was probably 200yards/600feet. I immediately slowed and rolled past at about 38. He had a puzzled look on his face as I rolled by, which was priceless. And even though he was only sampling traffic in my direction, he shot me a second time from the rear as I moved away...I can only assume the rear shifter did what the front did aswell. I know for a fact I was going 25 over when I was shot and didn't get any trouble from him.
Thats it, thats what I've experienced so far. I hope people find this info useful.
Anything posted here is purely fictional and only submitted to win the approval and respect of my peers and can not be held against me in legal matters.