I watched it last night. I thought the animation was somewhat odd. It almost looked like live action, but I felt that the crazy over the top anime action just didn't work with it. Hard to explain it, but it just looked wrong to have animated models that looked realistic battling crazy demons. I think it would have been better with traditional animation. Also, the way the suits were drawn made the characters all have a weird bobble-head look. Especially the old guy. Finally, the animation style made the dubbing more noticeable and intrusive. You can get away with more with traditional animation without the mouth movements getting out of sync.
You could tell they skimped on the amount of people to save on animation costs. You'd think you'd see a few more people in the middle of downtown Osaka. Instead we had our heroes battling hordes of demons in an urban wasteland with only a few bystanders here and here. It made the monsters look extra weird too, especially the giant woman, that one was fluffed up.
I thought the story was somewhat entertaining, albeit with some massive plot holes. Overall, I'd give it 3.5/5.