I joined for about six months and dropped them last week. Third shipment in a row with missing ingredients.

On the plus side, it put me in the regular habit of cooking together with my wife. We love many of the recipes, which are freely available on their website...we've already started "re-doing" many meals by picking up the ingredients on regular shopping trips.

EDIT: One other thought - the whole market seems a lot like the GroupOn craze in some ways. It's an idea that consumers are attracted to, but the economics and excess competition make the whole concept fragile.