Well this thread/product is no different from BFL approaches, he posted here actively for the first few pages and since then nothing from the OP. If this product was meant to be released surely he would want to keep it active regarding development and what not?
Actually, it's hugely different. BFL took full payment upfront and delayed shipment for months. For largecoin, according to the OP, only 15% of the price is held in escrow. Better than that, you get to have the product for a full month before paying the remaining price.
When you receive the unit and connect it to the network, you will be granted a temporary mining license enabling the system to mine for a period of 30 days. When we receive the balance of your payment, a permanent mining license will be issued to you.