I ordered mine the moment they started taking orders. I'm at #4813. This company seems legit, and they have a strong partnership with Dexcel Designs who are a well known company. Of course it is difficult to put an asic to market within a useful timeframe, and there is no guarantee they will succeed. Therein lies the risk.

For those not wanting to risk Alpha-T, I've heard that the next generation of GPUs will appear this year - they might have big advantages over the current ones for mining.