Even if they deliver on time (fat chance), the difficulty is jumping so high that no machine they sell will ever meet ROI barring some sick increase in the value of bitcoin, but still in that case, better to just hold onto bitcoin.
This has been said about every miner that has come onto the market since bitcoin mining began. You're not alone with that opinion, it's very common, which is why the pricing has become so competitive lately. Bitcoin mining is highly profitable if you get in line fast and pay the lowest $/GH (VMC). It is priced to take into account a 100% difficulty increase per month, and still make full ROI.. and then some.
