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Rounding out the 1690's feature set are TTS turn-by-turn directions that read street and POI names aloud, graphic lane guidance that displays a visual representation of highway intersections with valid lanes highlighted, and a feature called EcoRoutes. EcoRoutes is a collection of green driving tools including a fuel economy assessment, a series of green driving challenges, and a routing algorithm that attempts to calculate the most fuel-efficient route from point A to B.
The Nuvi 1690 was quick to boot and locked onto the satellite signals within 2 minutes of powering up with a clear view of the sky. We had hopes that, given access to cellular triangulation and potentially some sort of dead reckoning technology, the Nuvi 1690 would offer better positioning in tunnels, covered bridges, and urban canyons, but the PND doesn't seem to take advantage of either of these methods and got confused when driving on the lower level of the Oakland-San Francisco Bay Bridge or when passing through long tunnels.
With full bars on the NuLink signal meter, the Nuvi features relatively quick Google POI searches. Searching for one of our favorite sandwich shops took about 12 seconds to return results from the time we hit "Go." Searching the preloaded POIs for the same sandwich shop yielded almost instantaneous results. You can probably guess which search we usually defaulted to for the rest our testing.
One component that gave us trouble was the 1690's color touch screen. The screen seemed less responsive than many of the previous Nuvi models that we've tested, and it required a bit more pressure to register inputs. This was particularly frustrating when it came to inputting addresses using the onscreen keypad. Additionally, we periodically noticed the screen flickering slightly when the Nuvi was downloading data over the network, such as a POI search or when pulling a traffic update. We don't know if this is also the reason for the laggy screen response, but we do think that perhaps better RF shielding is in order.
Even without the NuLink service, the Garmin Nuvi 1690 is a solid portable navigation device. However, if you can live with the thought of being advertised to while you drive, the addition of connected data for a variety of safety, convenience, and entertainment uses is what really helps the 1690 earn its high feature score.
We ran into a few issues with the screen that cost the 1690 a design point and should probably be addressed in the next revision, but nothing that we'd call a deal breaker.
Performance was also quite good, but we feel that there were a few missed opportunities with cellular triangulation and dead reckoning tech that could help with tracking the vehicle's position when the satellite signal gets shaky. However, these are really bleeding-edge GPS technologies, so their apparent omission doesn't hurt the performance score too badly.
Overall, the good far outweighs the bad, putting the Nuvi 1690 near the top of our short list of recommended devices.