May I know where did you guys get the Insanity workout DVDs?

I've lost 6kg ever since I have started exercising but lately I've been really lazy to do cardio but excited whenever it's weight lifting days. I guess I get bored of brisk walking on a treadmill. I would love to start jogging outside but I'm afraid I wouldn't be mentally strong enough to jog 7km. I was thinking about getting Insanity workout DVDs but some said it's not worth it? I need some fun cardio workouts.