One would have to do a cost/benefit analysis, but I bet that preparing your own equivalent system with canned and dried foods would be more cost effective. And it would certainly give you more control.
A lady friend of mine is married to an ER doc, and she's just about as paranoid as I am. She bought a similar survival food system for her family (a year's worth) and it cost several grand. But it took her 5 minutes to place an internet order instead of a long time planning and purchasing. So to each is own.