Wow, this is an obnoxiously terrible film. Continuity is thrown out the window, as are (almost) any acting skills.
This film was written and directed by Kim Henkel, who co-wrote the original screenplay, and she said that she was trying to create the "real" sequel to the original with this film. If the movie ignored TCM 2 and Leatherface: TCM 3, that would be fine, and this film's story might make a little sense. Instead, the director decides to make mention of both those films in the first 30 seconds of the film, making this a continuation of that universe.
The problem is that there are two new brothers for Leatherface that never get explained (who are these guys?), and Leatherface has - for some unexplained reason - become a cross-dresser. How in the hell are any of these choices justified in this script? The short answer is that they aren't.
Apart from the absurd story and continuity problems, this film has some of the worst acting I have seen in a very long time. The teenagers in the movie are laughably terrible. Renee Zelwegger is decent, but she is terrible at playing the "tough guy" that she turns into later in the film. The only saving grace of this movie is Matthew McConaughey as a lunatic. There's no doubt he goes over-the-top, but at least he's enjoyable to watch unlike all the unemotional teenagers in the film.
This is a cinematic atrocity. There is no reason this movie should've been released, and is the black mark on the TCM franchise. From the story to the acting, to the terrible editing (it was as if the director didn't get enough coverage, and so she couldn't show any reaction shots that are essential in a horror film), there is no doubt this would place in my 50 worst films ever seen list, if I had one.
Thankfully the remake and the prequel are next in the series.
Note that I watched the cut American version of the film that runs 87 minutes, not the uncut 95-minute original because it is damn near impossible to get your hands on in the US.