"Das Experiment" is a movie based on the Stanford prison experiment back in the 70's, while it's obviously made more extreme for the sake of entertainment, it still succeeds at creating a claustrophobic, tense experience. Mortiz Bleibtreu from Run Lola Run is the main character and is pretty great, while the rest of the cast is equally good, playing interesting roles on both the prisoner and guard sides.
While you can guess the outcome from a mile away, it's still intriguing throughout and the 2 hour duration damn near flies by, especially when all hell breaks loose. This movie is also a prime example of early 2000's German cinematography. It's fast paced, surreal, and visceral like a MTV music video, when MTV was still good. It feels great and fits the mood perfectly.
Though overall, this movie is worth your time, there are some problems. As I said, the movie is predictable near the end and there's an "everything that could go wrong, will go wrong" feel to the whole thing, that rides throughout. It's not a deal breaker, but it gets annoying. Also the final frames leave much to be desired, since it goes for the art house route instead of showing more of the aftermath.
Das Experiment, it's fun, disturbed, and visceral. A great time with friends or by yourself. Definitely recommended.
PROS: Tense, well acted, nails the late 90's vibe well, music video-esque at times
CONS: Weak ending, predictable