I wouldn't categorize Lamb as a horror movie, more a mystery drama. In my case I figured out the "mystery" from almost the beginning but still it's worth a watch. It's not fast paced, but it's well filmed and the acting is more than decent. Strange to hear Noomi Rapace speaking Icelandic for the first time in a movie. Strange is also the plot, a bit weird but that doesn't mean bad. It's probably not going to be to everyone's taste but if you have an open mind and like something different you might enjoy this one.