Kinda fun
I'm not sure about it. I haven't watched much of Man vs Wild, and I haven't watched Bandersnatch, but it's the same idea. I've only done this first episode it was pretty quick. I will say that I felt kind of stupid every time he said "So you think I should...." Like I had chosen incorrectly. I also went back through to see if I could choose things to put him in peril, but he seemed to do okay. I'm not sure I want to keep going back and choosing all the options.
Because I know he's gone though and done all the scenarios and he has to say certain things, I felt Bear was more like the NPC even though he is really the only character. Part of me almost wishes that it was animated or something, so if I make a really stupid choice, wildlife could rip him apart...lol.