i have had my car for 3 years and never used the nav before.I usually just use my phone instead.Today i figured i would mess with it for the first time.Either i am doing somethihng wrong or this is the worst nav radio i have ever seen.I can only find main roads and i mean main roads.I tried to find my moms address and it wouldnt even find her street and she has been living there for 60+ years.Is this the way these units operate or am i doing something wrong?I have had nav radios in my srt4 and in my jeep and neither one of them have been a problem.