What's peoples opinion on Google nav? I used to have TomTom on my iPhone which was pretty flaweless but I've since switched to a Nexus 4 so thought I'd try Google nav out. The traffic info is spot on, but the navigation engine seems pretty poor. It'll choose initially what it thinks is the fastest route (not always the same as shown on Google maps, why is this?), but if you decide you want to head straight on instead of turning off you have to tell the phone to calculate an alternate route rather than it figuring it out itself like TomTom does.