Well, I did the calculation and it's not as bad as I feared: I made 16 portions from the recipe and I calculated that this would amount to (drumroll, please!)
230 calories per bar.
I haven't done a real nutritional analysis but I feel better about them now that I know this.
I found this link about snack bars that provides some perspective. This was written by a nutritionist.
So in summary, these bars have whole grains, protein, fat, simple and complex carbohydrates, and are simple to make.