Thanks again for the pictorial, rojomoto.
The install looks pretty straightforward. The catch is that the body computer has to be updated afterward. If you can get someone to do that for you for a half hour of shop time, you're definitely ahead on install costs.
My dealer is a friend, and he gave me a good price on the module and install, so it was a wash for me.
What I am really happy about is that it works, and works well! I continue to get consistent starts from my office to the parking garage, so it's pretty well warmed up when I go home at night. I'm about 400 feet away and 300 feet up, but I have a direct line of sight to the roof of the garage, and the signal must be bouncing around just enough off adjacent buildings to hit the Explorer, which is on the second to top level.
It also starts really well from inside restaurants, grocery stores, big box retailers, etc. to the parking lot. It has great range, and the bi-directional fob is great because you can tell when it starts.
Some of the best money I've ever spent on a vehicle. Doesn't help my fuel mileage, but I don't really care when it is 20 degrees outside!!