I don't think it seems like a good deal in general. Assuming they will let you do the "meal swap" at all the booths you want to try this plan, you'd be able to exchange your $42 qs dining plan for two three-snack "meals" per day plus the extra snack, for a total of seven snacks a day. That's $6 per snack and few f&w items meet that price point (steak, lamb, lobster items if I recall). I just can't imagine eating enough of those items to make it worth the hassle and expense, but perhaps if you were on a short stay or had gotten
free dining entitlements you wouldn't want to use elsewhere, that might be a good option!