I used to have a NAVALERT. I was very disappointed with it and returned it in less than a month's time. Mine arrived reading KPH instead of MPH, the altimeter that was an original feature of NAVALERT didn't work at my altitude (5000 feet), it was slow locking on to satellites, and the settings kept changing every time I turned it on.
Anyway, what I really needed/wanted was a duplicate of the NAVALERT-style dashmounted detector that actually worked. Sure glad Cheetah saw the light and came out with the C100. I ordered mine today and beat the factory price by $20. I won't post where I got it, don't want to violate any of the forum rules, but if you are interested PM me and I'll give you the link. I can hardly wait to get my C100. My speedometer has been broken for a couple of months, and it will be nice to know how fast I am really going Plus an upcoming trip to northern New Mexico means I'll be heading through red light camera areas. So I'll be protected.
One comment I noticed on the Radarbusters feedback area concerning the Chettah mirror, was that when using a link with a radar detector, the mirror lagged badly with reporting the detected radar source, and sometimes no report was issued at all. I'm not real concerned, I don't plan on using the radar detector link. But I wondered if anyone else experienced this situation?