Updating a portable navigation system
On the back panel is the Nuvi's single physical control: a power button.Tapping the power button suspends the Nuvi, shutting down its screen.Tapping it again causes the device to instantly reawaken.For those times when you need to shut the Nuvi down for extended periods of time, such as when packing it for travel, holding the power button for a few moments will totally shut down the device.
I also appreciated the conversational tone of the Nuvi's spoken turn-by-turn directions, which call out landmarks and use natural language." which simply starts turn-by-turn navigation with the fastest route possible.Routing and rerouting were quick and the paths chosen were logical, judging from my local knowledge of the test areas.However, at its thickest point, the 3597LM is about as thick as the rest of this class of portable navigation devices.
The hardware On the face of the Nuvi 3597LM, behind a capacitive glass panel, shines a crisp 5-inch TFT screen that is gorgeous.
The cable also powers the cradle's loudspeaker and integrates the FM/HD Radio antenna that receives the free, lifetime over-the-airwaves traffic data that transforms the Nuvi 3597LM into the Nuvi 3597LMTHD that I tested.