Is the a-GPS with navigation software good enough to be useful? Example, the screen size is not too small to be illegible when driving, screen brightness is bright enough in the car, available voice/audio turn-by-turn direction, hands-free, battery life not drained in few hours. In other words, it doesn't need a passenger to read it and tell the driver. If it's good enough, I'll consider this phone and it'll save quite a bit of not needing to buy a dedicated GPS navigator.

By the way, what is the recommended navigation software for this phone? Thanks in advance.