At $1,300 at Fry's, it is not a bad price for something that gives you GPS, Satellite, MP3, Video, and almost all the goodies a carputer can, less Internet and phone control of course.
I see three issues with it:
1- You are stuck with Sirius - No XM fans allowed!
2- You need a flat dash and good windshield clearance to use it. Disqualifies a lot of cars.
3- It is no fun because there is no installation involved, I don't know about you guys, but I get my kick out of a nicely executed project that I do with my own hands.