Good luck, DeeDee!
I like 30DS. I did the first 10 days, but then drifted to other exercise. I want to be more consistent with it again so I can finish all the levels.
I found it really challenging when I first started it. I had been neglecting my upper body, and JM doesn't.
Yesterday, I did it again for the first time in over a month. It had me dripping in sweat, just like old times. I love workouts that are tough enough to do that, but not so tough that I want to cry.
Would you say Insanity is far more intense than 30DS? Is it the exercise itself that's tougher or the length? I remember hearing those workouts are long, but I may be confusing that comment with P90x.