The board should take 16 months to pay off at today difficulty and exchange rates leaving eight months within warranty of guaranteed profit. The BFL-Single would take over eight months to pay off but with only six months warranty. Do the maths
So, now it is no longer a maybe but a fact that this unicorn board has a two year warranty? I'm done arguing with you as clearly your board is the superior choice.
I'm not arguing only defending my position and choice. I dislike this forum for all its trolling thats one of the reasons bitcoin.org no longer links to the forum.