Has anyone tried the Insanity Workout?

I am going to start the Insanity Workout today. Has anyone started and/or completed Insanity? Were you happy with the workout and the results?
Updates
+1 y
Thanks everyone for your answers! I just did day 1, and it was awesome! I'm mostly looking to tne up more rather than lose weight. I was definitely sweating though. Congrats to those of you who have finished it, and good luck if you're going to start it! :)
Has anyone tried the Insanity Workout?
Post Opinion