The one star is for the movie sticking to the action genre and delivering well choreographed albeit reptitive scenes.
I still remember the adrenaline rush that Part 3 gave me and the anticipation I had for this part. For all that to be shattered by the barely there plotline, unrealistic action scenes and a random ending is disheartening to say the least.
The movie was two hours too long and thrives off the franchise name. I'd suggest people to watch the first 3 parts again and forego seeing the 4th one