Saw this the other day.
Decent flick, nothing really exceptional about it but it's a nice feel good story. Story is pretty formulaic and it's almost a copy of Cool Runnings. If you go in without expectations you'll be entertained.
As for the actual details, about 98% of it is bunk.
Really the only accurate details are that there was a ski jumper from Britain named Michael Edwards and that he had American coaches. They even skewed how the actual competitions work but whatever.
But there are some good scenes with Matti Nykanen and some real footage of the opening and closing ceremonies which was nice to see. They even included Frank King's speech at the closing ceremony.