I don't think so. I find the voice system does not work very well. I have used Waze on my smartphone for some time now. The maps are always up to date, and it is crowd sourced so people report where the police are and stuff.
if you think of it $800 for 60 months is about $13.33 not so bad!...but look at the aftermarket also see what it has to offer! only thing i dont like about it is that it doesnt play DVDs or Music Videos so after market might be a better choice if thats something you'd want! i just got it cause i like the way it looked compare to the stock set up!