Mapping and navigation is a huge, very complex issue. I've had standalone GPS for years (Tom Tom or Garmin), suction cupped to my various windshields. Once a year you downloaded a map update (usually cost about $80) and hoped it was pretty accurate. They purchased their map data from NavTeq or TeleAtlas (since purchased by Tom Tom.) Addresses would usually map 'close', but seldom 'right on'.
Then came along Google. They've invested only knows how much in mapping. They deploy vehicles with GPS and cameras that pull in data on everything from overpasses to exit change lanes. They've incorporated "Fix a Problem" feedback mechanisms into their mapping products - sort of crowd sourcing to improve nav and map accuracy. I'm in awe sometimes at how well Google Nav and Maps works. That's the reason there was such a backlash last year when Apple flipped to its own mapping product. It just didn't have the depth of Google. If your house number isn't in quite the right place, Google has a way for you to tell them that.
Love Google or hate 'em, when they set their sights on something, they have the bucks to make it work. And with nav/maps, they have.
The problem that Bringgo is facing is that they're likely licensing their mapping data from NavTeq or TomTom (TeleAtlas), and only plan to update maps once a year. That's the same limitation that in-dash nav faces --- licensed mapping data that isn't updated that regularly. But it will be interesting to see if that is competitive in the long term with the more dynamic Google mapping.
Static mapping works 98% of the time, and when it works, you don't notice it. But that other 2%, like when the address is off or a road has been closed, you do notice. And that's where Google wins.
I'm looking forward to getting Bringgo up and running, because I do like the idea of a larger map screen. But in the meantime, I have a cradle that keeps my Galaxy S3 pretty front and center. The Mylink screen size is about 7", the S3 is 4.8". The Galaxy Note 2 is 5.5", and the upcoming Galaxy 4 is 5". (The iPhone5 is 4"). So the screen sizes for smartphones that run Google Nav are closing in on Mylink.
So look at Bringgo from a Note 2 user's standpoint. Pay $60 for an app to get 1.5" of extra screen diameter, with likely less sophisticated and updated mapping data. iPhone users, with only a 4" screen, might flock to Bringgo, but S4 and Note 2 users? It's a toss up. I'm starting to think that GM should have thought about devoting that dash real estate used by Mylink for a great swivel cradle for next gen smartphones with bluetooth connectivity. Then you can run TUneIn or Pandora or whatever nav app you choose (that's FREE) in native mode from your phone and screw Mylink.