im interesting into USB miner too, its been so long searching this thing but no one can makes me had an interests in owning it, still make same comparation the advantage and deficient side from mining with USB miner or GPU. most people might suggest mining with GPU are way more recommended rather than USB miner, but im curious about USB miner, its look more friendly and easy to operate with low cost. thank you for any advice in advance, i will consider every single of your opinion.