I got to demo the current working revision of the Cheetah GPS mirror at SML this weekend and it's amazing. There are 2 awesome features that you'll really appreciate.
In Dover, DE where I used to live this would have been priceless. Basically, for 5+ miles you have every store in the town setting right next to the road. The speed limit fluctuated from 25MPH to 40MPH. And the V1 would go from 5 to 9 bogeys the whole time.
Well, with the Cheetah mirror all you would have to do is set it to filter out your alerts until you drive over anything you could imagine but I would of used 45. So just like that your V1 now acts like a 9500i. The only problem I found with this is it DOES filter out Ka as well. However it does not filter out Laser. I made a request to please allow it to report Ka, so I've got my fingers crossed that gets changed.
Another neat feature you can have the mirror just say the band it detects. So it would say K band, then that's it no more tones.
If I still owned a V1 this would be a must have!