Could be better, but,
This review is from: Returner [DVD]  (DVD)
this is simply a good bit of entertainment and IMHO unjustly overlooked.
It's hardly original in many ways, but there are elements around the time travel that are cleverer than most. Many of the elements are all pretty familiar from this type of movie, but surely, you knew that already.
Elements of the story are culled from more mainstream violent types of movie as well as movies with less adult themes.
Overall, it's knitted together into a passably exciting romp, with some good staged action, and effects-at least in interacting with the aliens - that put many a big budget Hollywood franchise to shame- such as the truly woeful elements of the effects where humans and robots interact in the awesomely dreadful plot free zone that is "Transformers".
Altogether, an enjoyable romp, and one that's due for a re-watch.
Good fun. You won't, I hope, regret it.