I drove from Milwaukee, WI to Fort Lauderdale, FL a couple times in the last 12 months, and I always had decent coverage along the highways (I90 I94, I55, I24, I75, I95). I was able to stream music (while running the Maps App) along the trip during my 2 day drive. The last trip was in May, 2015. I hit 3G at a few spots along the way, but the data was usable and I never got frustrated with the service.