Is it possible to land a plane only with the Garmin® Synthetic Vision? A synthetic vision system shows the pilot the position of his plane in a 3D-modelled flight environment.

It's like a 3D TAWS. It also shows the position on the runway:





As I have seen, this feature works quite good. It's sometimes a bit off the centerline, but on the runway.

It is clearly stated that this is only to be used as feature to enhance the situational awareness. And I am also quite sure that this is not authorized as primary navigation source.



But imagine: You are flying in zero visibility. You have an emergency and must land. There is no ILS. (You have done no flight planning and the bad weather surprised you) 


Would it theoretically be possible to land a plane only with this synthetic vision? 
Is it accurate enough?
Would the plane at least come down in one part?
Apparently yes, according to this 2008 review of the system in a Diamond DA40:


  With [a safety pilot], I stayed under
  the hood for the entire flight—takeoff, en route, approach and
  landing—using the system’s visual cues. I managed to land the airplane
  without breaking anything, barely. It wasn’t pretty, but it
  demonstrated what was possible.