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I still have and love my Unknown. I got a prototype frame from their shop in South Korea (they're not American originally) so it's a little more unique than what they've churned out recently.
They're solid bikes, well built (mine has handled everything I've thrown at it including a collision with a van and is still going strong) and with the right setup can look really nice.
The stuff on the Korean site is much nicer than that on the European or American site as it's run by the original owner of the brand and more care is taken, rather than the quantity over quality way the other sites seem to operate on.
Didn't @roboto had a nice Unknown build?