If you already have sample libraries, the Independence download may be underwhelming to you. I have not drilled into it very deeply, but did not find things I didn't already have and I do not use Kontakt. Biggest downfall is that 70GB is an all-or-nothing thing, no ability to pick and choose.
Definitely download at night and go away from the computer. I found that just using the computer starts to throttle it (even with no other internet usage). It came up full throttle for me at 2AM EST, but before that was choked to around 200KB/sec.