It's pretty good (except the "lost at sea" ep). The host goes and gets himself stranded each ep with a multitool and whatever little else he has... plus 60 pounds of camera gear. He then strips down whatever method he was stranded with (if any) and survives for a week, usually attempting to get back to civilization on his own. One of the big things is that he does it with all of the camera gear -- so, you see a shot of him walking away into the distance, he has to come back, pick up the camera, and then re-walk the same way.
He certainly knows what he's doing. He got his start start making an award-winning documentary with his wife about the year that they spent living a paleolithic existence in the Canadian wilderness.
Whatever you do, avoid like the plague a show called "Man vs. Wild". It's such a con. The guy pretends to be surviving, but if you pay attention, you find that everything is staged... the raft he builds in "Desert Island" is bound with manila rope, the river that he swims in to "get away from a bear" in the Rockies episode doesn't hide the fact that he's wearing a life jacket under his clothes (or that the camera filming his cliff jump is on the wrong side of the cliff, meaning that he waited while his crew went around), etc. It's half full of survival techniques and half full of suicide techniques disguised as survival techniques.