I Guess I'm More Accepting than the Devil!
I am binging all of Rob Zombie's movies, in chronological order. While I've only seen this and "House of 1000 Corpses" (This is the much-better sequel) I am confident that this is one of Rob Zombie's finest projects.
The movie is amazing, albeit quite violent, and the violence can be grueling to sit through. There are scenes of abuse, and one in particular around the 00:33:11 mark that is particularly disturbing. (It's a scene in which Bill Moseley aka Otis forces a woman to strip down to her bra and panties, and it's quite memorable, because of a specific other grotesque thing that happens in this scene, the woman's friends and husband are forced to watch, so you may want to set a 33 minute timer at the beginning of the movie, and just skip ahead a couple minutes once it goes off). There are sadistic murders and one torture scene featuring a Sheriff torturing the three main protagonists or antagonists, depending on where you stand, in which a cattle prod, a stapler, and nails are used. It is one of the gorier scenes of the movie, but not too disgusting. A man's neck is snapped. Multiple characters are shot. There are two different scenes that are sexual and violent simultaneously, the more graphic one is at the aforementioned 00:33:11 timestamp. A house is also set on fire, nothing graphic is shown. There's also a super-entertaining wild-west style shootout at the beginning and end of the film. There is a pretty high body count, and the movie is also much gorier and somewhat more sexualized than its predecessor (House of 1000 Corpses).
There is a comical sex scene in which a topless woman is shown "riding" Sid Haig aka Captain Spaulding, it ends poorly and is revealed to just be a dream. The beginning of the movie does start out with nonsexual nudity, (a dead, nude woman being dragged along a forest) as well as a woman showering naked, you can see her full-frontally when she's pulled out of the shower, still in a nonsexual manner. This is neither overly disturbing nor sexual, there's not much objectionable about a plain and simple depiction (although they are in slightly violent situations) of nudity.
There is a somewhat gratuitous amount of swearing, but not in a way that gets very annoying.
The performances from Sid Haig, Bill Moseley, and Geoffrey Lewis are all extremely convincing, (especially Geoffrey Lewis as Roy), and the performance from Sheri Moon as Baby is the perfect Bonnie minus Clyde. The performances from all of the friends and lovers in a motel being invaded are also fairly emotional, except for Brian Posehn's performance as Jimmy, which was a bit lackluster and just a cliché character in general. Overall, great acting, also notably Matthew McGrory's terrifying and simultaneously cutesy performance as Tiny. Many other amazing performances as well, William Forsythe's realistic performance as Sheriff Wydell, Michael Berryman's performance as Clevon, the list goes on and on.
The Devil's Rejects is, at heart, a movie about crime, grief, revenge, and a messed-up beyond belief family, with a surprisingly relaxing soundtrack. And it also has some of the most beautiful cinematography I've ever seen (the beautiful cinematography being at the end of the movie, aside from that, the camerawork is slightly shoddy and shaky, but it's not very noticeable).
So parents, as long as you make sure to skip that scene at 00:33:11, (and the other timestamps I've mentioned below) the movie should be suitable for most teens 14 and up, if your kid is either studying film or extra mature, let them see the movie as early as 12. You should watch House of 1000 Corpses first, although it's not needed per se. Both movies are free on Amazon Prime. Amazing movie overall!!!
Extra notes: Most graphic scenes to skip and their timestamps: 00:33:11 to 00:35:12 (gross rape-y scene), 00:43:02 to 00:46:43, (super violent double murder), 01:08:12 to 01:09:01 (sexual murder), 01:26:06 to 01:33:00 (torture scene, maybe a little longer than necessary, but just to be safe, I might go with that amount of time.