used it 2x when I moved from FL to MN a few months ago, worked perfectly! It was funny, I got to Chicago on a Fri afternoon, traffic was horrendous, was barely moving, the the Nav had me exit off into Chicago, do a uturn, then back on the freeway. I was skeptical at first but trusted ole Google.....I bypassed about 30 min of traffic, lol.
The 2nd trip from FL to MN, I used it along w/ my Hummer built in gps, Google Nav was superior