I think the idea of the movie was good and the and interesting. But that all the movie practically is one long flashback told by Dr. Mark Davidson who we see in panic in the start does take some of the excitement out of the movie. It is a bit like reading the last chapter in a book first to see if you want to read the rest.
That said I think the idea was good enough and I could live without knowing how, why, and who. The actors did a fine job too. The movie is not fast paced and it is talky. I did not mind it being talky but would have liked more filling as there was a clear hint where it would end.
All in all I do not regret watching it. I have seen both much better and much worse sci-fi.
I would recommend to sci-fi lovers that care more about story than special effects and do not mind that the movie is a bit talky.
That said I think the idea was good enough and I could live without knowing how, why, and who. The actors did a fine job too. The movie is not fast paced and it is talky. I did not mind it being talky but would have liked more filling as there was a clear hint where it would end.
All in all I do not regret watching it. I have seen both much better and much worse sci-fi.
I would recommend to sci-fi lovers that care more about story than special effects and do not mind that the movie is a bit talky.