For low calorie, I don't think this can be beat. The sauce was a little bit chalky for my tastes, but my husband couldn't even tell it wasn't the real thing. I don't know if the chalky-ness was the flour, or if I warmed it too long... I just kept waiting for it to get thick, and it never did! The flavor was excellent, though, and I will try this again using cornstarch ? or something instead of the flour and less milk.