Nissan's upgraded stereo and map are incredible. The map, for example, offers brilliantly clear graphics, with easy to understand commands. In addition to your standard map/directional fare, drivers get real-time traffic and an energy flow screen (ala Toyota) that provides an overview of what's going on under the hood and behind the back seat. You can also choose a historical accounting of your fuel efficiency. Meanwhile the audio system is crisp and sounds good when it's loud,– a necessary benefit considering the amount of noise that comes from the Altima Hybrid's powertrain.