Great watch, will likely watch again, and do recommend.
It's usually a good sign when the worst part of a time travel movie is the time travel.
I could probably make an hour long video on the time travel in this movie, especially compared to "Looper", but I'll forego that enough to say that it's well leveraged for the purposes of the movie.
The "White Spikes" are amazingly well put together, though I think projectile spikes are an odd biological evolution.
The story is far from perfect, but the cast, the acting, the situation, and especially the action are all executed wonderfully with a high production value to back it up.