yes
I have an '09 tahoe and the sat nav is crap.
I can't enter addresses while moving, I can't speak an address.
I constantly confuse the MI and MIN on the display because they are 1 letter off and .000001 inches apart.
The directions are often stupid.
I'm not paying MORE for traffic when many GPSs do that FREE.
Entering multiple destinations, you have to go BACKWARDS from how your brain works. You think, ok i need to go here, then here, then here. BUT you are forced to enter your FINAL destination FIRST.. .WTF?!
THEN, when you get to a 'waypoint' it only gets you within 500 or so MILES of the actual place you wanted to go.
You can scroll recent destinations, but NOT the address book.
Basically, it's a system designed by an 80 year old for an 80 year old.
My 15 yr old sister could design a better system.
CHeck out the 'My Ford Touch'. If the Ford Expedition gets it, GM can kiss my a$$ good bye. They are so far behind it looks like an etch-a-sketch.
http://www.youtube.com/watch?v=vrLdMi_r7-Q&feature=related