As head of HashFast, Eduardo deCastro is responsible for everything the company does. He has taken bitcoins from customers and has broken promises for delivering bitcoin mining products on time. The company has overpromised and underdelivered. They were scheduled to ship miners at the end of October. By Dec 31st it was clear they would not ship in 2013. Customers were promised full refunds but HashFast only pretends to pay the full amount. Customers who paid in bitcoins will not be refunded in full bitcoins even though HashFast claimed that they would.