From prior review of their website, some of the ideas seem a bit silly. They were advocating horizontal fueling of a shuttle which is mechanically impossible.

I would have grave doubt that the shuttle could ever hold anywhere nere 75 passengers. They have difficulty now with heat rejection until they can open the bay doors on orbit. Can you imagine the power consumption and waste heat created by an life support system designed for that many? Not to mention the weight.

As to the ET's, I will suspend judgement until someone demonstrates proper safing and control of even one tank for an extended period.