I had the seventymm subscription for about 1.5 years. I am in Bangalore and never had problems with delivery of the disks. The delivery boys are prompt. You have to book the disk before 11pm any day and next day it will be delivered. Sunday and public holidays are exception.
The problem is non-availability of disks. My wishlist is about~70 movies and many a times not a single movie is available. I think it is time for me to try some other service.