Dreadful. Terrible script and editing. Do not waste your money.

Rating: 3/10 (18 August 2015)

Don't buy the overwhelming positive reviews. To put things into the context, I liked the first Mission Impossible which had a cool atmosphere as a throwback to the original series presumably (which I didn't watch). The sequel was a typical John Woo action vehicle with a few MI touches added (like masks) - hated it. I really liked the rather realistically done MI3 and loved the main character's chemistry with his wife, but then it was all wasted in the 4th installment which was rather generic and boring (hated the Simon Pegg addition to be a comic relief in yet another movie).
Reading the reviews I had high hopes, but the movie is too long, boring with too many plot holes to comprehend, presumably due to terrible editing. There is a love interest (albeit rather one sided, it seems), but it's not developed in any way. There is a potentially interesting anti-IMF organization, but it's not developed in any way. The main infiltration seems to copy the one from the first movie with some ridiculous additions, but it's used up rather quickly leaving you to wonder what was the point of including it. I can't escape the feeling that the script was either too long or incomplete and many scenes were just improvised and tacked on as the shooting went on. I actually intend to watch the hated MI4 just to see which one made less sense.