I'm familiar with fade-in yes, I didn't notice it.
I loaded up a bunch of songs that have a very distinct opening rift, and they were all crystal clear, no sense of a dampening of the opening sounds at all.
As for packaging, hmmm it did come in a blister pack with a cardboard insert if memory serves me today, however I would have long recycled it. The item itself has no distinguishing characteristics to differentiate it from a knock-off.
The one I have in my hand is this one:
http://usb.brando.com.hk/prod_detail.php?prod_id=00144&dept_id=015&cat_id=031
from Brando, not the other one they have that is similar.
The headphones that came with it do not appear to have a brand on them either sorry, but they are a full sized headphone jack, not a skinny proprietary one.
It would not surprise me that you could find this item on a competitor's site, just make sure you double check the shipping fees, Brando is US$3 for any amount. Shopping online recently, I paid more shipping and handling on something than the original item's cost. :|
Hope that helps at least a little. Check both sites return policies in case you're unhappy with the item.
~K