If you are a beginner or intermediate who is still wobbly on red runs, do not bother getting the 'Mont Blanc Unlimited' ski pass. This more expensive pass contains higher lifts that access several black ungroomed and off piste runs which will not be useful for your ability level.
Instead, get Chamonix 'Le Pass' which allows you to access all of Le Tour, Le Brevent, and Le Flegere as well as all but one lift at Les Grandes Montets. You can always pay the difference to upgrade your pass later if you want to, even if you buy a several day pass.
If you want a rest day check out the 'non consecutive day' ski passes on offer. They cost a bit more but allow the flexibility to take 1 or 2 days off from skiing to do something else, and then ski again a day or two later.


