Fantastic movie!! The plot is very good and the action is what you expect from a Mission Impossible movie. The movie adds a nice amount of humor to pair with the action as well.
Since this is part one, I feel it did an amazing job setting up the second movie for part two. Without any spoilers, the ending of this movie didn't feel like they rushed to get to a certain mark. It also didn't feel like they came up with a cheap ending just to make this film end. The team does there thing and it leads perfectly into the next movie.
This movie was like 2 hours and 45 min, but it didn't feel like it. Had they offered an intermission when this movie ended and started part two right away, I would easily watch part two.