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knc isn't perfect...but would you rather be waiting for your BFL???
AND yes, you have to be on your toes in the bitcoin mining world, blink and you missed it!!
Ironically, I got my BFL Little Single 25GH* the very same day that Jupiter arrived. Would've been almost ok even after 6 months of waiting, except the LS does 0-15GH depending on my luck turning it on. I also ordered some asicminer chips that Yifu never delivered. So KNC turned out to be my best investment up to now. Hit ignore on the complainers so we don't feed them.