Not yet. I've been assembling the supplies. However, I may opt against it as I kinda like having one Crossfire with the nav unit and another without.

I did order the GPS antenna using the part # listed above and it was as described. If you're going to install the nav unit, you should also get the AM/FM antenna adapter (the antenna connection on the back of the nav unit is different than the non-nav unit) and check that your wiring harness is pre-wired for the backup and speed sensors. If not, you'll have to order wires with the correct connectors from Becker. They're 87 cents apiece and I can give you the part #s if needed.