Well I finally got mine installed, and I love it! They were able to put the Sirius box in the same spot the XM box was, and hook the XM antenna up without any modifications to it (so they say). I think the XM antenna acutally gives me better sirius reception than my other car, who was always cutting out when I drove under bridges. It's a shame you only get 1 line of info for Sirius, though

I am kind of annoyed by the automatic dimming of this thing, though. It seems it was hooked up to the headlight wire, so when the headlights go on, the radio automatically dims. Which is fine for nighttime driving, but during the day, if it's a little overcast, the headlights will automatically come on, and the display dims, making it hard to read.

Also annoyed that the first time you switch to the nav after turning on the car, you always get that nag screen and have to press OK. Is there a way to permanently get rid of that screen?

On a similar note, every time I turn on the car, i get a message saying that the unit is not hooked up to the emergency brake correctly. I am assuming this is because my installers did a bypass or something? I didn't ask them to, but I was able to play a DVD without having the emergency brake on. That's cool, I guess, but that message sure is annoying.