So busy on here, it's great!
Ihatethecold, notyummy is the person to ask about Insanity...she sounded like she's rushing round London today but sure she'll respond later. (It sounds proper 'ardcore!)
Welcome to all new peeps on the thread 
Giniffer 0.5 is absolutely fine!! As long as they are challenging you they're doing the job... I find the strength/weights stuff much harder than cardio generally, so you are not alone!
Hi Woodland! I think very few people actually manage 30 days back to back, there's usually a rest day or two somewhere in the week. As for when you finish, well the world of Jillian Michaels is your oyster!
You could go back through Shred with heavier weights, or you could move on to something different. Ripped is the same length as Shred and has 1 more level (levels 2, 3 and 4 are generally a step up from Shred so it would be a good progression). She's got loads of other DVDs too, depending on what you're looking for (toning, cardio, abs, buns 'n' thighs
).
Not sure what to do later today. Neck still rather stiff so may rest again, although I don't want to as I'm on holiday from Friday for a week so will be doing a fair bit of resting then!
Have a good day all 