Spiral

I've recently finished saw3D which I absolutely found great and I'm going to watch jigsaw soon. But before so, I watched the opening of spiral on Youtube and I'm just like,wtf is this?! I mean, if someone showed me this without telling me I'm not even sure I'd recognize it's a saw movie if there wasn't the phrase, "make your choice." Now, I'm kinda thinking of watching jigsaw, skipping spiral, and watching X, but what's your opinion about this?Do you think spiral would be worth a watch?