I don't think it's really cheaper than making your own food. If you buy it for a month and you eat it three times a day, it ends up being about $2.5 per meal, or $7.5 a day. My breakfast costs me $.5 to $1, so that leave $3.5 per meal. It's probably what I average already, if not less. I think I spend about $100 maximum on groceries per week for my girlfriend and me, and that includes extras like an occasional bottle of wine.
I think I remember him saying that the recipe was "open source", maybe you could just make it yourself to save.
I can see his saving time argument though. Although there are days I gladly spent an hour or more in my kitchen, some days when I'm busy or lazy I would consider it.
Sidenote - calling this "corporation", I don't know if it's a joke or just poor marketing.