"Wrong Turn 3" is surprisingly TERRIBLE. I was a HUGE fan of the first 2. The first was serious, and the second was cheesy fun. The third is neither.
The cut in three, and face scraped off deaths are the only good parts of the film. And even they look like shit. Although, the "cut in three" death is probably better than 75% of the deaths in "The Final Destination".
The acting in the third is terrible, the characters are very unlikeable (Written that way), the film is completely shot in the dark so it's hard to tell what's going on most of the time, and it's very unbelievable that an entire group of prisoners couldn't kill Three Finger. Wait, they beat the shit out of him, stabbed him a million times, but he's still moving! How realistic.
As stated in another comment, the film is 90% talking. The movie starts off decent (with terrible acting), but quickly goes downhill.
This is one movie I won't be adding to my collection. Not even when it's in the $5 bin at Wal-mart.