TomTom
Rating: C
http://www.ilounge.com/index.php/reviews/entry/tomtom-international-tom-tom-u.s.-canada/
"Overall, TomTom U.S. & Canada is only a decent GPS app for the iPhone, priced high enough even without its optional accessory that users could easily go out and buy a standalone GPS unit, yet lacking in the sort of enhanced iPhone-specific functionality that might justify the purchase of the app instead. Unless it drops significantly in price, or dramatically improves its functionality with a free update, we wouldnt have any major reason to recommend it over less expensive alternatives."
Navigon
Rating: C
http://www.ilounge.com/index.php/reviews/entry/navigon-mobilenavigator-north-america/
"At its current price of $70, MobileNavigator North America is an okay solution that will get users to their destinations, albeit less efficiently and impressively than theyd expect from an iPhone 3G or 3GS; at its proposed regular $100 price, wed sooner buy a standalone GPS and forget using the iPhone for anything but our most casual mapping needs. In the absence of an Apple-developed solution, our strong belief is that lower prices and superior functionality will be needed before third parties will have a shot at fulfilling GPSs killer app potential on this platform."
CoPilot
Rating: B-
http://www.ilounge.com/index.php/reviews/entry/alk-technologies-copilot-live-8-north-america/
"All in all, CoPilot Live may start out on a somewhat low note because of its registration feature, and it might not have the big brand name that TomTom possesses, but its quickly apparent that this low-priced GPS app is currently a much stronger value and a generally better use of the iPhone 3G or 3GS hardware, apart from a few non-trivial issues. To the extent that it can leverage live Internet-based data to assist you with directions, display better-looking maps, and do multi-destination planning, its both an aesthetically pleasing and more functional piece of software. The clickable on-map POIs and settings menus give GPS fans a lot to play with, and even more to enjoy while on the road. However, the question marks as to its map database are significant, and as with all of the iPhone GPS apps out there, smoother animation, more detailed maps, and a better POI database wouldnt hurt at all. ALK gets somewhat of a pass on most of these issues because of its asking price, but our advice for the time being would be to hold off until some of its bugs are fixed and some clarity is provided on the nature of its map database. Given its $35 pricing and the features it offers relative to its competitors, it would otherwise be instantly recommendable; its future success is truly a question of how wisely ALK handles the necessary upgrades."
Sygic
Rating: B-
http://www.ilounge.com/index.php/reviews/entry/sygic-mobile-maps-us/
"All of that having been said, its easier for us to recommend Sygic Mobile Maps US than MobileNavigator for two major reasons: superior pricing and POI management. Neither of these programs delivers a truly awesome, iPhone-optimized GPS experience, but Sygics $60 asking price for its U.S. map software is lower than Navigons for U.S.-only navigation, and even its $80 North American version is less expensive with Canada and Mexico included than the standard $100 price for the Mexico-less MobileNavigator. Moreover, though neither piece of software comes close to the ideal in identifying points of interest for your travels, Sygics database came closer and offered multi-destination planning, which at least as of now is absent from the Navigon software. We still have yet to see a truly great navigator for iPhone users, but Sygic is a fine option for the time being, and worthy of our limited recommendation."
They put more focus on price than I would personally like but interesting reading nonetheless.
Rating: C
http://www.ilounge.com/index.php/reviews/entry/tomtom-international-tom-tom-u.s.-canada/
"Overall, TomTom U.S. & Canada is only a decent GPS app for the iPhone, priced high enough even without its optional accessory that users could easily go out and buy a standalone GPS unit, yet lacking in the sort of enhanced iPhone-specific functionality that might justify the purchase of the app instead. Unless it drops significantly in price, or dramatically improves its functionality with a free update, we wouldnt have any major reason to recommend it over less expensive alternatives."
Navigon
Rating: C
http://www.ilounge.com/index.php/reviews/entry/navigon-mobilenavigator-north-america/
"At its current price of $70, MobileNavigator North America is an okay solution that will get users to their destinations, albeit less efficiently and impressively than theyd expect from an iPhone 3G or 3GS; at its proposed regular $100 price, wed sooner buy a standalone GPS and forget using the iPhone for anything but our most casual mapping needs. In the absence of an Apple-developed solution, our strong belief is that lower prices and superior functionality will be needed before third parties will have a shot at fulfilling GPSs killer app potential on this platform."
CoPilot
Rating: B-
http://www.ilounge.com/index.php/reviews/entry/alk-technologies-copilot-live-8-north-america/
"All in all, CoPilot Live may start out on a somewhat low note because of its registration feature, and it might not have the big brand name that TomTom possesses, but its quickly apparent that this low-priced GPS app is currently a much stronger value and a generally better use of the iPhone 3G or 3GS hardware, apart from a few non-trivial issues. To the extent that it can leverage live Internet-based data to assist you with directions, display better-looking maps, and do multi-destination planning, its both an aesthetically pleasing and more functional piece of software. The clickable on-map POIs and settings menus give GPS fans a lot to play with, and even more to enjoy while on the road. However, the question marks as to its map database are significant, and as with all of the iPhone GPS apps out there, smoother animation, more detailed maps, and a better POI database wouldnt hurt at all. ALK gets somewhat of a pass on most of these issues because of its asking price, but our advice for the time being would be to hold off until some of its bugs are fixed and some clarity is provided on the nature of its map database. Given its $35 pricing and the features it offers relative to its competitors, it would otherwise be instantly recommendable; its future success is truly a question of how wisely ALK handles the necessary upgrades."
Sygic
Rating: B-
http://www.ilounge.com/index.php/reviews/entry/sygic-mobile-maps-us/
"All of that having been said, its easier for us to recommend Sygic Mobile Maps US than MobileNavigator for two major reasons: superior pricing and POI management. Neither of these programs delivers a truly awesome, iPhone-optimized GPS experience, but Sygics $60 asking price for its U.S. map software is lower than Navigons for U.S.-only navigation, and even its $80 North American version is less expensive with Canada and Mexico included than the standard $100 price for the Mexico-less MobileNavigator. Moreover, though neither piece of software comes close to the ideal in identifying points of interest for your travels, Sygics database came closer and offered multi-destination planning, which at least as of now is absent from the Navigon software. We still have yet to see a truly great navigator for iPhone users, but Sygic is a fine option for the time being, and worthy of our limited recommendation."
They put more focus on price than I would personally like but interesting reading nonetheless.