I may have discovered something. I think I do better at this DVD in the evenings. A combination of early start (every Tuesday due to brownies) and soreness from Fitness Pilates combined with a visit to the osteopath on Monday meant I couldn't do the shred this morning. So I planned to do it after dinner (with time for digestion). And I really enjoyed it!
The problem is mornings are easy, I just get up earlier. With all the evening activities I do it's harder to build a routine for exercising after work. Hmm, something to ponder further.