It was ok, not great

I felt that the script was dragging too much on the storyline. The action were cool at the end.

Not bad but not entertaining to me

Very entertaining and exciting. Great premise and intriguing setup. Execution a little less stellar and the odd sense of 2 movies-in-one was a bit off-putting. The finale after returning from the future to change things in the present day seemed underwhelming and totally predictable and not in the least realistic (sure, a military plan sneaks into Russia, traipses across the terrain, blows up bombs, etc. and Russia is completely unaware).