30 Day shred question...

For all you 30 DS people out there who have done the workout.....I know you can ge the workouts on youtube. Soooo, how long do you do each level? A week for each level? Do you have any breaks (like insanity has a day of rest) or do you workout 7 days/week? I'm finishing up insanity round 2 now and am interested in doing 30 DS.

Thanks!