This is a meal replacement bar marketed primarily to diabetics working on weight loss. It's not (IMO) really appropriate for postops, as the carb-to-protein ratio is way too high.
Happily, the version I sampled (Chewy Chocolate Peanut) was both tasty and satisfying. It's said to taste like a Snickers bar, and I'd say there's a resemblance. The soy aftertaste kind of ruins the illusion though :-).
Nonetheless, it's a better value and a MUCH better taste than a lot of other meal replacement bars, and I felt satisfied from it a lot longer than from some others I've tried.