I'm very, very late to the party, but I say don't knock it until you've watched it.
I say it's more of a a game show rather than a reality show.
If you have played Mafia or Werewolf at a party, then this is basically a televised version of it. However, the contestants have to contribute to the prize money by completing various Crystal Maze type challenges during the day, which involves team work.
The discussions around the round table on who they think is a traitor before banishment, is in my opinion, the best part of the show.
Like a lot of people here, I had no interest in it to begin with, but then a friend talked about it during one of our pub quiz nights.
I binged the lot in 3 days. It's compulsive viewing.
I won't say anymore, but you will be rooting for some people and shouting at the TV at others.