Following is a review I made in 2014:
Although directing/editing style is not new, it still feels fresh. The visual effects are also done well, but the aftermath of the damage done by both the title characters and the military is done even better. One thing that's impressive about the whole production is that it's very expansive for a budget of less than $1 million. You would not even notice. Sadly, there is a point where the lead characters are tiring, such that I'd appreciate if at least one of them got killed at some point. They are also too damn lucky.
I didn't find the characters tiring this time around, nor did I care about their luck. I also enjoyed all performances, and as mentioned in the older review, the aftermath of the damage is amazing, among the best ever, and much of it set in gorgeous scenery.