We watched it on the SIL's home cinema. Roger Donaldson who did The Worlds Fastest Indian, unlike that movie he wasn't able to make replica McLarens and do footage of racing around tracks, so it's more an extended doco with some actors and voice overs, recreating a bit here and there, and lots of old footage. They did make a replica of Bruces Austin 7.
I would've liked a bit more of Denny Hulme in the story, but really, it wasn't about him. I've read Denny's bio, and there is more than enough for a movie...they just have to find someone tough enough for the role.