The Garmin nuvi 3790LMT is identical to the top-rated Garmin nuvi 3790T (*Est. $250) , but it adds free map updates for the life of the unit. Several top expert sources recommend the nuvi 3790LMT alongside -- or instead of -- its slightly less expensive sibling. Both units feature a slim, iPhone-like case and multitouch screen, free traffic alerts for the life of the unit (supported by pop-up ads) and the ability to "learn" local traffic patterns to pick more efficient routes. They're also voice-commandable, although this feature doesn't always work well in tests. Experts -- and most owners -- overwhelmingly recommend these models, but some owners report problems, such as the navigator freezing up or having trouble locking onto satellites.
GPSLodge.com, GPSTracklog.com and ConsumerReports.org all conduct thorough tests of the Garmin nuvi 3790LMT, although the first two sites provide much more description than ConsumerReports.org does. Experts lavish praise on this GPS unit, but owners at Amazon.com are more critical.
After testing the Garmin Nuvi 3790T (identical to the 3790LMT, but without the lifetime map updates) for several weeks, including some long trips, Scott Martin concludes that it is the "hands down the best GPS I've ever used." He does find a few cons, but they're minor.
Review: Review: Garmin nuvi 3790T/3790LMT Review -- Impressive Next Generation of GPS Units, Scott Martin, Nov. 19, 2010
2. GPS Tracklog
Rich Owings calls the Garmin nuvi 3790LMT (and its sibling, the 3790T) "the best nuvi yet" at the conclusion of this comprehensive review. Owings analyzes all of the unit's major features, shows plenty of screen shots and includes a video review.
Review: Garmin nuvi 3790LMT, Rich Owings, Dec. 1, 2010
ConsumerReports.org ranks the Garmin nuvi 3790LMT alongside 136 other GPS devices, after testing them all for performance and usability. Experts here also take price and battery life into account when making their top picks.
Review: GPS Ratings, Editors of ConsumerReports.org
Owner reviews for the Garmin nuvi 3790LMT are mixed. Most of the more than 100 customers who post reviews here like it, but several have serious complaints. Some say the nuvi 3790LMT operates sluggishly or crashes, that traffic information is wrong or voice commands don't work.
Review: Garmin nuvi 3790LMT 4.3-Inch Bluetooth Portable GPS Navigator with Lifetime Map and Traffic Updates, Contributors to Amazon.com