Mild spoiler alert!
A short and crisp opinion about the movie, yes it was so good in terms of what you would expect from it, the gore content. But yes it has many eccentric decision-making, like who will give away a piece of brain or a leg just to survive while being held in an uncertain captivity?
Also when you just escaped from a live or die situation, the quickest instinct is to get the f out of the place, but here the ex-victim starts to play the game against the perpetrators. How ingenuine!
Yeah other than these it is a gore treat which is exactly why people watch the movie.