Hmmm. probably sea shipping from China or air? From 28th April I understoon many Cryptonight coins won't support same POW so you can't mine them with this ASIC. Also there's no information about warranty. Usually ASICs have just 60-90 days of warranty and if one of the hashboards die then you have to send with your own cost all the machine back to China and when you get it back the profitability isn't that any more. Well, very risky business. I've heard also that Chinese ASIC sellers almost never ship on time.