In my opinion, the intent of the show is to deminstrate what CAN be done in a survival situation that MAY help you survive. It's not meant to be a documentary on Bear Grylls surviving in the wild. There is a little bit of good advice throughout his show but there is also a lot of unnecessary risk taking. If the average Joe off the street tried some of the stunts he pulls, I'd wage they would not likely live to see the end of the day.
When it's all said and done though, I would much rather watch his show than Big Brother 8 or any of the other nonsense that seems to dominate the boob-tube these days.

smitty