Wow, Mirrors was laughably bad. I finally ended up finishing the movie on my third attempt, and the only thing interesting about it was the fact that it kept topping its own ridiculousness, again and again. Even hardcore fans of Paula Patton, Kiefer Sutherland, and bad horror movies will find little justify the 100 or so minutes that it takes to watch this.
Think of the countless number of times in horror movies where there was a jump scare involving something suddenly appearing in a mirror as a person looks into it. Ninety percent of the time, these scenes are lame, right? Now imagine an entire movie based around that happening over and over. It's really not much of a surprise that this is so crappy now, is it?
Even once you're past the dead-on-arrival premise, Mirrors has plenty more problems. Kiefer Sutherland is completely wrong for his role. Completely. He just swears awkwardly and slips into Jack Bauer mode at the most awkward times. To be fair, it would be hard for any actor to make much out of the part with a script this bad. Gems like "You gotta be careful of the water, it creates reflections!", actually made me laugh out loud. It's impressive that the cast could say lines like that with a straight face. Add all that to the fact that it moves from one cliche to the next and there are no scares to be found. Mirrors is just an absurd, disposable horror movie with a bad ending. Don't bother with it. Watch The Broken instead - it deals with a similar concept, but executes it much better.