Of all those I've tried, TeleNav V5 for PalmOS is my favorite GPS solution so far. It's obvious that MANY thousands of man and woman hours went into this new, free upgrade. Yes, it's a subscription service, but you can try it for free, subscribe if you like it, and bail out at any time. Its small footprint on your Treo means no ponderous maps to carry around on a card. Even if you drive into a dreaded "no signal here, pal" area, the program "thinks ahead"; it remembers your plotted route and keeps on prompting and routing you until it re-acquires a data connection.

I know from TreoCentral Forum postings that people ARE using it on their 680s and 755ps, maybe even their 650s, but don't expect support from TeleNav if you are UNTIL they have fully tested and certified it for those models. As of this writing, it's certified only for the Sprint and Verizon 700p models, but that should change soon.

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Criteria  Rating Design 4 Usability 5 Innovation 5 Cost/Benefit 5 Overall (not an average)	Pros NEW 3D navigation mapping mode NEW "Follow Me" mode in 3D AND 2D Improved, more logical GUI Very small footprint – no huge map files to load Crystal-clear voice navigation prompting Type in or call in destination addresses Ten million Points of Interest! Works in tandem with superb Web site Install in RAM or on card Maps updated quarterly Subscription service – very reasonable price
	Cons 2D "Drive To" mode missing but should be back Takes a while to learn all its features No night colors mode Cannot change map font sizes